Lastly, the Watercress has for many years held credit with the common people for curing scurvy and its allied ailments; while its juices have been further esteemed as of especial use in arresting tubercular consumption of the lungs; and yet it has remained for recent analysis to show that the Watercress is chemically rich in "antiscorbutic salts," which tend to destroy the germs of tubercular disease, and which strike at the root of scurvy generally. These salts and remedial principles are "sulphur," "iodine," "potash," "phosphatic earths," and a particular volatile essential oil known as "sulphocyanide of allyl," which is almost identical with the essential oil of White Mustard.
Moreover, many of the chief Herbal Simples indigenous to Great Britain are further entitled for a still stronger reason to the fullest confidence of both doctor [5] and patient. It has been found that when taken experimentally in varying quantities by healthy provers, many single medicines will produce symptoms precisely according with those of definite recognized maladies; and the same herbs, if administered curatively, in doses sufficiently small to avoid producing their toxical effects, will speedily and surely restore the patient to health by dispelling the said maladies. Good instances of such homologous cures are afforded by the common Buttercup, the wild Pansy, and the Sundew of our boggy marshes. It is widely known that the field Buttercup (Ranunculus bulbosus), when pulled from the ground, and carried in the palm of the hand, will redden and inflame the skin by the acrimony of its juices; or, if the bruised leaves are applied to any part they will excite a blistering of the outer cuticle, with a discharge of watery fluid from numerous small vesicles, whilst the tissues beneath become red, hot, and swollen; and these combined symptoms precisely represent "shingles,"—a painful skin disease given to arise from a depraved state of the bodily system, and from a faulty supply of nervous force. These shingles appear as a crop of sore angry blisters, which commonly surround the walls of the chest either in part or entirely; and modern medicine teaches that a medicinal tincture of the Buttercup, if taken in small doses, and applied, will promptly and effectively cure the same troublesome ailment; whilst it will further serve to banish a neuralgic or rheumatic stitch occurring in the side from any other cause.
And so with respect to the Wild Pansy (Viola tricolor), we read in Hahnemann's commentary on the proved plant: "The Pansy Violet excites certain cutaneous eruptions about the head and face, a hard thick scab being formed, which is cracked here and there, and [6] from which a tenacious yellow matter exudes, and hardens into a substance like gum." This is an accurate picture of the diseased state seen often affecting the scalp of unhealthy children, as milk-crust, or, when aggravated, as a disfiguring eczema, and concerning the same Dr. Hughes of Brighton, in his authoritative modern treatise, says, "I have rarely needed any other medicine than the Viola tricolor for curing milk-crust, which is the plague of children," and "I have given it in the adult for recent impetigo (a similar disease of the skin), with very satisfactory results."
Finally, the Sundew (Drosera rotundifolia), which is a common little plant growing on our bogs, and marshy places, is found to act in the same double fashion of cause or cure according to the quantity taken, or administered. Farmers well know that this small herb when devoured by sheep in their pasturage will bring about a violent chronic cough, with waste of substance: whilst the Sundew when given experimentally to cats has been found to stud the surface of their lungs with morbid tubercular matter, though this is a form of disease to which cats are not otherwise liable. In like manner healthy human provers have become hoarse of voice through taking the plant, and troubled with a severe cough, accompanied with the expectoration of abundant yellow mucus, just as in tubercular mischief beginning at the windpipe. Meantime it has been well demonstrated (by Dr. Curie, and others) that at the onset of pulmonary consumption in the human subject a cure may nearly always be brought about, or the symptoms materially improved, by giving the tincture of Sundew throughout several weeks—from four to twenty drops in the twenty-four hours. And it has further become an established fact that the same tincture [7] will serve with remarkable success to allay the troublesome spasms of Whooping Cough in its second stage, if given in small doses, repeated several times a day.
From these several examples, therefore, which are easy to be understood, we may fairly conclude that positive remedial actions are equally exercised by other Herbal Simples, both because of their chemical constituents and by reason of their curing in many cases according to the known law of medicinal correspondence.
Until of late no such an assured position could be rightly claimed by our native herbs, though pretentions in their favour have been widely popular since early English times. Indeed, Herbal physic has engaged the attention of many authors from the primitive days of Dioscorides (A.D. 60) to those of Elizabethan Gerard, whose exhaustive and delightful volume published in 1587 has remained ever since in paramount favour with the English people. Its quaint fascinating style, and its queer astrological notions, together with its admirable woodcuts of the plants described, have combined to make this comprehensive Herbal a standing favourite even to the present day.
Gerard had a large physic-garden near his house in Old Bourne (Holborn), and there is in the British Museum a letter drawn up by his hand asking Lord Burghley, his patron, to advise the establishment by the University of Cambridge in their grounds of a Simpling Herbarium. Nevertheless, we are now told (H. Lee, 1883) that Gerard's "ponderous book is little more than a translation of Dodonoeus, from which comparatively un-read author whole chapters have been taken verbatim without acknowledgment."
No English work on herbs and plants is met with prior to the sixteenth century. In 1552 all books on [8] astronomy and geography were ordered to be destroyed, because supposed to be infected with magic. And it is more than probable that any publications extant at that time on the virtues of herbs (then associated by many persons with witchcraft), underwent the same fate. In like manner King Hezekiah long ago "fearing lest the Herbals of Solomon should come into profane hands, caused them to be burned," as we learn from that "loyal and godly herbalist," Robert Turner.
During the reigns of Edward the Sixth and Mary, Dr. William Bulleyn ranked high as a physician and botanist. He wrote the first Boke of Simples, which remains among the most interesting literary productions of that era as a record of his acuteness and learning. It advocates the exclusive employment of our native herbal medicines. Again, Nicholas Culpeper, "student in physick," whose name is still a household word with many a plain thinking English person, published in 1652, for the benefit of the Commonwealth, his "Compleat Method whereby a man may cure himself being sick, for threepence charge, with such things only as grow in England, they being most fit for English bodies." Likewise in 1696 the Honourable Richard Boyle, F.R.S., published "A Collection of Choice, Safe, and Simple English Remedies, easily prepared, very useful in families, and fitted for the service of country people."
Once more, the noted John Wesley gave to the world in 1769 an admirable little treatise on Primitive Physic, or an Easy and Natural Method for Curing most Diseases; the medicines on which he chiefly relied being our native plants. For asthma, he advised the sufferer to "live a fortnight on boiled Carrots only"; for "baldness, to wash the head with a decoction of Boxwood"; [9] for "blood-spitting to drink the juice of Nettles"; for "an open cancer, to take freely of Clivers, or Goosegrass, whilst covering the sore with the bruised leaves of this herb"; and for an ague, to swallow at stated times "six middling pills of Cobweb."