190 MINERAL WATERS AND MEDICINAL SPRINGS OF ESSEX. Gould, F.S.A., Mr. M. E. Hughes-Hughes, of Leez Priory, the Rev. Canon Ingles, of Witham, Dr. Henry Laver, of Col- chester, the Rev. Thomas Myers, of Twinstead, Mr. Christopher W. Parker, of Faulkbourne, Mr. W. Ping, of Wanstead, the Rev. C. P. Plumtree, of Woodham Ferrers, the Rev. L. N. Prance, of Stapleford Tawney, Mr. Philip Savill, of Chigwell Row, Mr. C. B. Sworder, of Epping, Mr. G. E. Tasker, of Ilford, Mr. C. J. H. Tower, of Weald Hall, Mr. H. Warren, of Dovercourt Spa, and Mr. Hastings Worrin, of Little Dunmow. We are indebted in a still greater degree to Mr. J. C. Thresh, D.Sc., M.D., and Mr. W. H. Dalton, F.G.S., F.C.S., who have been kind enough to go through our matter and give us much valuable criticism and advice, chiefly on chemical and geological points. Mr. Dalton's suggestions as to the probable geological origins of the various waters described will be found chiefly in Section III. hereafter. It will be convenient, we think, if, before discussing each of our Essex wells in detail, we insert— II.—A BIBLIOGRAPHY (ARRANGED CHRONOLOGI- CALLY) OF THE MORE IMPORTANT WORKS TREATING OF ESSEX MINERAL SPRINGS. 1699.—ALLEN, Benj., M.B.—The Natural History of the Chalybeat & Purging Waters of England, with their Particular Essays and Uses. . . . London : Printed and Sold by S. Smith & B, Walford, at the Prince's Arms, in St. Paul's Churchyard, 1699. [4o] + 185 + [6] pp., post octavo. Dedicated to Charles, fourth Earl of Manchester, then living at Leighs Priory. This is practically the earliest systematic treatise on the Mineral Springs of England. Though valuable in its day, it is a very poor production from the literary point of view, having been written mainly (as the author tells us in his Preface) whilst he was an undergraduate at Cambridge, with very little leisure. The diction and punctuation are, therefore, very detective. The author treats of eight Essex Mineral Springs—namely, those at Leighs (pp. 18-19), Witham (p. 19), Mark's Hall (p. 21), "Felstead" (i.e., Little Dunmow : p. 28.), Colchester (p. 128), South Weald (pp. 144-147), Upminster (p. 148), and Woodham Ferrers (pp. 158-160). Dr. Allen (1664-1739) was a son of Dr. Benj. Allen, of London. After studying at Queen's Coll., Cambridge, he commenced practice (apparently before 1686) at Braintree, where he became intimate with John Ray and Samuel Dale, both then living there. He was an excellent naturalist. He married Katherine, daughter of Dr. Joshua Diaper, first of London, but afterwards of Braintree. Dying 28th Feb. 1739-40, aged 75, he was buried in the churchyard at Black Notley (where he had probably gone to reside), immediately adjacent to his friend Kay (see Essex Nat., iv., pp. 192-193).