In this manner Caroline’s girlhood passed. We may picture her walking up and down the garden walks and terraces of Lützenburg hearing Leibniz expound his philosophy, or sitting with the Queen of Prussia on her favourite seat under the limes discussing with her “the why of the why”. She was the Queen’s constant companion and joy, and when, as it sometimes happened, she was obliged to leave Berlin for a while to pay a visit to her brother at Ansbach, Sophie Charlotte declared she found Lützenburg “a desert”.

Leibniz, Sophie Charlotte’s chosen guide, philosopher and friend, is worthy of more than passing notice, since his influence over the Princess Caroline was second only to that of the Queen of Prussia herself. In Caroline’s youth, Gottfried Wilhelm Leibniz was a prominent figure at Berlin, whither he frequently journeyed from Hanover. He was one of the most learned men of his time, almost equally eminent as a philosopher, mathematician and man of affairs. He was born in 1646 at Leipzig, and after a distinguished university career at Jena and Altdorf, he entered the service of the Elector-Archbishop of Mainz, and, as he possessed the pen of a ready writer, he was employed by him to advance his schemes. The Archbishop later sent him to Paris, nominally with a scheme he had evolved for the re-conquest of Egypt, really with the hope of distracting Louis the Fourteenth’s attention from German affairs, so that Leibniz went in a dual capacity, as a diplomatist and as an author. In Paris the young philosopher became acquainted with Arnauld and Malebranche. From Paris he went to London, where he met Newton, Oldenburg and Boyle. His intimacy with these distinguished men stimulated his interest in mathematics. In 1676, when he was thirty years of age, Leibniz quitted the service of Mainz and entered that of Hanover. For the next forty years his headquarters were at Hanover, where he had charge of the archives, and worked also at politics, labouring unceasingly with his pen to promote the aggrandisement of the House of Hanover, especially to obtain for it the electoral dignity. Leibniz’s work threw him much in contact with the Electress Sophia, with whom he became a trusted and confidential friend, and whose wide views were largely coloured by his liberal philosophy.

Leibniz had a positive passion for work, and in these, the most active years of his life, he not only laboured at political affairs, but worked hard at philosophy and mathematics, turning out book after book with amazing rapidity. At the suggestion of the Electress Sophia, he concerned himself with theology too, and strove at one time to promote the reunion of the Catholic and Protestant creeds, his principal correspondent being Bossuet. The English Act of Parliament, vesting the succession to the throne of England in the Electress Sophia and the heirs of her body, being Protestant, put a summary stop to these labours. Henceforth there was no more coquetting with Roman Catholicism at Hanover. The Electress Sophia, Calvinist though she was, affected to manifest an interest in the Church of England, and especially favoured the English Protestant Nonconformists.

To consult archives for his history of the Brunswick-Lüneburg family, which he had been commanded to write, Leibniz travelled to Munich, Vienna, Rome and other cities. At Rome, the Pope, impressed by his great learning and controversial ability, offered him the custodianship of the Vatican library, if he would become a Roman Catholic, but Leibniz declined the offer. Apart from the fact that it involved submission to the Roman Church, it did not offer him a sufficiently wide field for his ambition. It is impossible to withhold some pity from this great scholar. He was one of those who put their trust in princes; he was greedy of money, honours and worldly fame; he loved the atmosphere of courts, and to have the ear of those who sit in high places, and so he deliberately prostituted his giant brain to writing panegyrics of the princes of paltry dukedoms, when he might have employed it to working out some of the greatest problems that interest mankind.

His worldly prospects at this time largely depended on the Queen of Prussia. Sophie Charlotte had known him at Hanover, and she invited him to Lützenburg. Through his influence she induced the King of Prussia to found the Academy of Science in Berlin, and to make Leibniz its first president. At his suggestion also, similar societies were founded in St. Petersburg, Dresden and Vienna, under the immediate patronage of the reigning monarchs, who were thus able to pose as patrons of the arts and sciences. Leibniz received honours from all of them, and the Emperor created him a baron of the empire.

Leibniz often met the Princess of Ansbach at the Queen of Prussia’s reunions, and he noted how high she stood in the favour of his royal mistress. He became attracted to her by her wit and conversation, which were unusual in a princess of her years. He spoke of her in glowing terms to the Electress Sophia, who later made acquaintance with the young princess at Berlin, and she, too, was charmed with her talents and beauty. Leibniz, who was much at Berlin in those days, kept his venerable mistress at Hanover acquainted with the movements of the princess. We find him, for instance, writing to tell the Electress that Caroline had returned to Berlin after a brief visit to Ansbach, and of the Queen’s pleasure at seeing her again. The Electress Sophia replied from Herrenhausen, desiring him to assure Caroline of her affection, and adding, “If it depended on me, I would have her kidnapped, and keep her always here”. This seems to show that, even at this early date, Sophia had it in her mind that she would like Caroline to marry her grandson, George Augustus.

In the autumn of 1704 the Electress Sophia paid a long visit to her beloved daughter, and spent two months with her at Lützenburg. The King of Prussia had great respect for his mother-in-law; she agreed with him in his love of pageantry, and, like him, was a great stickler for points of etiquette. But she had a larger mind, and was not content with the mere show of sovereignty: she loved the substance—domination and power. The Queen of Prussia received her mother with every demonstration of joy, and the festivities of Lützenburg were set going in her honour. Leibniz and Beausobre were there, and many intellectual tournaments took place. The Princess Caroline was there too, whom Sophia observed with especial interest. Caroline was now in her twenty-first year, and had blossomed into lovely womanhood; her features were regular, she had abundant fair hair, large blue eyes, a tall and supple figure and a stately bearing. The fame of her beauty and high qualities had travelled through Europe. True she was dowerless, the orphan daughter of a petty prince of no importance, but her guardian was the King of Prussia, and she was known to be the adopted daughter of his Queen. Thus it came about that her hand was sought by some of the most powerful princes in Europe, notably by the Archduke Charles, titular King of Spain, and heir to the Emperor, whom he later succeeded. The idea of this marriage had long been in the air, but in 1704 it took definite shape, and the Elector Palatine, who was interested in the matter from political reasons, solicited Caroline’s hand for the Archduke. Negotiations were proceeding while the Electress Sophia was at Lützenburg. We find Leibniz writing from there:—

“Apparently the Electress remains here until November, and will stay as long as the Queen is here. Two young princesses, the hereditary Princess of Cassel and the Princess of Ansbach, are also here, and I heard them sing the other night, a little divertimento musicale, the latter taking the part of ‘Night,’ the former that of ‘Aurora,’ the equinox adjusting the difference. The Princess of Cassel sings very tunefully; the Princess of Ansbach has a wonderful voice. Every one predicts the Spanish crown for her, but she deserves something surer than that crown is at present, though it may become more important; besides, the King of Spain (the Archduke) is an amiable prince.”[3]

The predictions were a little premature, for the Archduke’s wooing did not progress satisfactorily. As Leibniz said, the prospects of the Spanish crown were somewhat unsettled, though they were sufficiently dazzling to tempt a less ambitious princess than Caroline, and she was always ambitious. Her heart was free, but if it had not been, she had well learned the lesson that hearts are the last things to be taken into account in state marriages. A more serious difficulty arose in the matter of religion. In order to marry the titular King of Spain it was necessary for Caroline to become a Roman Catholic, and this she could not make up her mind to do. Perhaps she had inherited the Protestant spirit of her famous ancestor, George the Pious; perhaps the influences of Wittenberg were strong upon her. She was certainly influenced by the liberal views of the Queen of Prussia and the arguments she had heard at the reunions at Lützenburg. She was all for liberty of conscience in matters of faith, and shrank from embracing a positive religion, and of all religions Roman Catholicism is the most positive. Besides, it would seem that, though indifferent to most forms of religion, she really disliked Roman Catholicism, and all through her life she was consistent in her objection to it. Her guardian, the King of Prussia, though a Protestant himself, could not sympathise with her scruples. In his view young princesses should adapt their religion to political exigencies, and so he made light of her objections, and urged her to marry the King of Spain. Her adopted mother, Sophie Charlotte, maintained a neutral attitude: she was loath to part with her, but she refused to express an opinion either way. But the Electress Sophia, who was nothing if not Protestant, since her English prospects were wholly dependent on her Protestantism, greatly desired Caroline as a wife for her grandson, George Augustus, and did all she could to influence her against the match. She writes from Lützenburg: “Our beautiful Princess of Ansbach has not yet resolved to change her religion. If she remains firm the marriage will not take place.”[4]

Meanwhile Caroline, perhaps with an idea of gaining time, or forced into it, consented to receive the Jesuit priest Urban, and allow him to argue with her. The Electress Sophia again writes: “The dear Princess of Ansbach is being sadly worried. She has resolved to do nothing against her conscience, but Urban is very able, and can easily overcome the stupid Lutheran priests here. If I had my way, she would not be worried like this, and our court would be happy. But it seems that it is not God’s will that I should be happy with her; we at Hanover shall hardly find any one better.”[5] The result of these interviews was uncertain, for the Electress Sophia writes a few days later: “First the Princess of Ansbach says ‘Yes’ and then ‘No’. First she says we Protestants have no valid priests, then that Catholics are idolatrous and accursed, and then again that our religion is the better. What the result will be I do not know. The Princess is shortly leaving here, and so it must be either ‘Yes’ or ‘No’. When Urban comes to see the Princess the Bible lies between them on the table, and they argue at length. Of course, the Jesuit, who has studied more, argues her down, and then the Princess weeps.”[6]