In a treatise published in 1522 Lucas attacked Luther's teaching on several points, but on receiving a conciliatory answer from the great German reformer he decided on entering into negotiations with him. He sent a member of the Unity, Brother Roh[82] or Horn, to Wittenberg with copies of several of his works. Luther does not seem to have had a very clear idea of the identity of the community which wished to enter into relations with him, for he addressed his answer to "his dear nobles and friends the brethren called Waldenses living in Bohemia and Moravia." The contents of the letter appear to have displeased Lucas, who wrote several treatises for the purpose of "strengthening" the brethren against the teaching of Luther. Lucas, indeed, somewhat later sent a second messenger to Wittenberg, but the disagreement continued, and subsequently a complete rupture took place. To the end of his life Lucas continued to labour at the reorganisation of the Unity. One of his latest and most important works was his Zpráva Kněžka ("Instruction for the Clergy of the Unity"), published in 1526; he died two years later.

It has already been mentioned that Brother Lucas was a voluminous writer. Dr. Jireček in his biography published in 1875 enumerates sixty-eight works of Lucas, some of which, it is true, are known only by repute and have not been preserved. Since the appearance of Dr. Jireček's book, Dr. Goll has discovered works of Lucas that are not included in his list. Among the works of Brother Lucas known now only by name but enumerated in Dr. Jireček's list is an "Answer to the ten articles of Master Jerome Dungesham[83] of Oxford, (written) against the apology of the Brethren published in 1514." The first work of Lucas, was as already mentioned, his Barka or "Bark." This work too was believed to be lost, but within the last years Dr. Goll has discovered a MS. which contains this once celebrated work of Lucas. The allegorical name of the book is thus explained by the author. He tells us that in the first part of his work the bark signifies the Unity, and that it is his purpose to explain out of what planks it is constructed, what are its requirements, who is its captain and guide, and what is the destination of its course. In this first part of the work the captain is Jesus Christ. The second division of the book deals with "The Bark of Antichrist," with the foolish and misguided people who occupy it, and with the weighty reasons for flying from that bark, the course of which leads to perdition. Like so many Bohemian works of this period, the "Bark" treats mainly of Antichrist. It is interesting as being very similar, and in parts identical, with one of the ancient books of the Waldenses. It undoubtedly throws some light on the obscure question of the relations between the Bohemian brethren and the older community.

Of the many other works of Lucas I shall be able to notice even briefly but very few. The two Professions of the Faith of the Unity, addressed to King Vladislav, and similar documents addressed to Erasmus and Luther, have been already mentioned. Very curious is Lucas's work entitled The Revival of the Holy Church, and the reasons which render it certain that such a revival has taken place in the shape of the Unity. Lucas draws a curious mystic parallel between the life of Christ and the development of the Unity. He also refers to the simplicity of the primitive Church, and to the gradual increase of the power of the Bishops of Rome. In distinction from his predecessors, Lucas no longer believes in the "donation of Constantine." He only tells us that Constantine placed the Bishop of Rome before all other bishops. "Constantine," Lucas tells us, "seated Sylvester on a white horse. This appeared wonderful to the people, and in their Latin or Italian speech they exclaimed, 'Pape! Pape!'[84] that is, 'What a great, great wonder!'" Only Charles the Great, Lucas tells us, added temporal power to the ecclesiastical supremacy. It is particularly noticeable that in this book also Lucas does not allude to his travels, though on several occasions it would have been natural to do so. It is almost certain that this silence is intentional. Dr. Goll has, with great sagacity, suggested its cause. The brethren now believed that the true primitive Church had been revived in their own community, and did not wish to recall the fact that they had formerly sought for it elsewhere.

The polemical works of Lucas are very numerous, and are directed indifferently against all those who did not accept the doctrine of the Unity as expounded by him. His controversies with Luther have already been mentioned. A work of Lucas's is directed against Zwingli, whose teaching had also penetrated into Bohemia. He also engaged in a theological controversy with "Wolfgang, the barefooted friar." Wolfgang, one of the earlier champions of the Church of Rome, played a curious part in the great theological controversy that absorbed almost the whole intellectual activity of Bohemia during two centuries. I shall again refer to him. Another controversial book of Lucas's directed against Brother Kalenec, a member of the "small party" in the Unity, is interesting as containing the author's opinion on Chelčicky, whose memory was naturally very popular with the smaller and more retrograde fraction of the Unity. Lucas writes: "You take refuge with Peter of Chelčic, and recommend to others his books, such as the Net of Faith. I, who have read and copied out many of his books before I joined the brethren, will say that in many matters he thought wrongly, and in a manner contrary to Scripture, and that he wrote obscurely and without moderation. I have also heard from those brethren that were with him much that was not praiseworthy, particularly that he was very irritable and vindictive. Thus, having fallen out with a priest, he would not forgive him till his death; so that priest himself told me. And he (Chelčicky) unjustly defamed the Taborite priests, particularly as regards their teaching on the sacrament."

A year before his death, Brother Lucas again returned to his favourite subject, the identification of the Unity with the primitive Church, in his treatise On the Origin of the Unity. Dealing with the manner in which the consciousness of the corruption of the Church reached Bohemia, Lucas writes: "The movement began through the Waldenses in England, where Wycliffe was the king's chaplain, but only read mass. And a Waldensian with whom he was acquainted said to him that he only fulfilled half the duty of his office, because he did not preach; and he proved this from Scripture.... Then of those who at that time (in England) suffered much adversity and martyrdom, some went to other countries, and particularly to Dresden, and thence some of them afterwards proceeded to Bohemia," Though unhistorical, this account is curious as containing what was probably a very old tradition. Lucas here, as was frequently the case with Bohemian writers of his time, describes as "Waldenses" all early opponents of the Church of Rome.

Brother Lucas was certainly one of the greatest men of the Unity, probably the greatest theologian whom the community produced. It was principally through the reorganisation of the community, that is his work, that the brethren were able to play a considerable part in Bohemian history. It is, however, an exaggeration to consider Lucas as a "second founder" of the Unity. The main lines of Brother Gregory's great structure remained. Of Lucas as an author, Brother Blahoslav[85] writes as follows: "Brother Lucas wrote a great many books, but he was not a very good Bohemian (writer); he imitated Latin more than is befitting, and his knowledge of German was also harmful to him, for his family came from a place where much German was spoken. 'In summe Latinismos et Germanismos plurrimos admittere solebat.'[86] Therefore, and also for another reason,[87] his works appeared to many not clear and displeasing."

In connection with Lucas I shall briefly refer to his associate Krasonický. Krasonický was, like Lucas, an adherent of the "large party." He appears to have been a fertile writer, but many of his works are known only by name. Among those that have been preserved is a treatise addressed to Brother Amos, the leader of the "small party." Another work of Krasonický, recently discovered by Dr. Goll in the town-library of Görlitz, is addressed to Cahera, then administrator of the Utraquist consistory. Its subject is the sacrament, a question on which so large a part of the theological controversy of the period revolved. Krasonický's treatise, however, goes far beyond the immediate limits of his subject. Of the foundation of the Unity he gives an account that is far more detailed than that of Brother Gregory, from which I have quoted, though it does not contain many facts that are found in the writings of yet later writers. Krasonický also refers to the then all-important question of apostolic succession, the existence of which he altogether denies. Even should it yet exist, he writes, it certainly cannot be found within the Church of Rome. Like Brother Lucas, Krasonický maintains that St. Peter never visited Rome. When referring to those who had borne witness to the corruption of the Roman Church, he mentions "Dr. Jerome Savonarola." He writes of him: "The works that he composed, his letters to the emperor and others, prove what his opinions were. Half the city mourned over him when the Pope first caused him to be tortured, then publicly proclaimed what torture had forced him to confess, and at last caused him on the public square of Florence to be first hanged on a cross with two companions, and then to be burnt." Dr. Goll is, no doubt, right in conjecturing that this accurate account of the death of Savonarola is derived from Brother Lucas, who was an eye-witness of that event. Other existent theological works of this period are ascribed both to Krasonický and to Prokop, who has already been mentioned. Blahoslav describes Krasonický as "a sensible and learned man, a friend of ancient simplicity." Even in Blahoslav's days many of Krasonický's works had already been lost.

Of the writers of the "small party" it will be sufficient to mention Brother Amos, its first leader. He is known to have written three theological treatises, one of which has been partly preserved in a work of Brother Lucas, written for the purpose of refuting it. Amos, like Krasonický and the majority of the writers of the Unity, wrote only in Bohemian.

The life of Bishop Augusta (born 1500, died 1572) belongs, like that of Archbishop Rokycan, rather to the political history of Bohemia than to literature. Though his fame as a preacher is far greater than as a writer, he was the author of a large number of theological works. Born in humble circumstances—his father was a hatter—and not having received a very extensive education, Augusta's talents, and yet more his indomitable energy and determination, soon brought him to the fore. Born a member of the Utraquist Church, he joined the Unity at the age of twenty-four. He was prepared for his clerical duties by Brother Lucas, and in 1532 became one of the elders—or bishops, as they were often called—to whom the entire government of the Unity was intrusted. His influence soon became predominant among the brethren. While Brother Lucas and Augusta's younger contemporary, Blahoslav, wished above all to preserve the separate character of the Unity, Augusta was in favour of a close alliance, if not of a union, with Luther and the German Protestants. Augusta, for this purpose, twice visited the great German reformer at Wittenberg, and also had, in 1546, an interview with the Protestant Elector of Saxony. In the following year war broke out in Germany between the Emperor Charles V. and the German Protestants, whose leaders were the Elector of Saxony and the Landgrave of Hesse.[88] After the defeat of the Protestants at the battle of Mühlberg, Charles's brother, Ferdinand, King of Bohemia, dealt severely with their Bohemian sympathisers. Augusta was arrested and imprisoned for a long time in the castle of Pürglitz or Křivoklat. His companion, the young priest Bilek, has left us a very interesting account of Augusta's prison life.[89]

During the whole term of his imprisonment, which only ended in 1564, Augusta maintained his claim to the leadership of the Unity. When the only other bishop died, the brethren, who had established secret communications with him, asked if they should elect new bishops, but Augusta refused his consent. After his liberation he resumed his rule over the community, residing first at Brandeis-on-the-Adler, afterwards at Jungbunzlau. The obstinacy and tenacity, not to say narrow-mindedness, which is ever characteristic of Augusta, involved him in incessant controversies during the last years of his life. It is perhaps to his opponents that should be traced the rather unfavourable account of his last years, according to which he "found great pleasure in expensive clothes and furs, as well as in select dishes, handsome carriages, and generally in an ostentatious manner of living."