Owing to the mechanical necessity that only a small surface of the roller should press on the die at a given moment, the diameter of the cylinder requires to be small, so that several of these dies, and consequently of the rollers, will be required to complete the entire plate from which the ultimate printing of the note is effected. Finally it may be well to conclude this brief account of the British school of engraving by calling attention to the considerations which ought to govern buyers of engravings; buy only that which gives real personal satisfaction, distrust a seller's inducements, in price be ruled by the amount that can be justly afforded, reject alluring thoughts of future money gain (or be prepared to pay the sure penalty--destruction of natural artistic feeling and hope of further cultivation), and ever bear in mind the words of Constable to his engraver: "Tone, tone, my dear Lucas, is the most seductive and inviting quality a picture or print can possess; it is the first thing seen, and like a flower, invites to the examination of the plant itself."[73] * * * * * *** The writer of the Chapter on English Engraving desires to acknowledge the facilities kindly placed at his disposal by Mr. Sidney Colvin, Keeper of Prints and Drawings at the British Museum, and to express his recognition of the valuable aid afforded him by Mr. F. M. O'Donoghue, of the same department. CHRONOLOGICAL TABLE OF THE MORE IMPORTANT ENGRAVERS BELONGING TO THE BRITISH SCHOOL OF ENGRAVING. _Foreign Engravers practising in England are marked with an asterisk._ b. stands for born; d., died; fl., flourished; c., about. 16th Cent. RAYNALDE, Thomas. Published in 1540 a book called "The Birth of Mankind," illustrated by copperplate engravings. GEMINUS, Thomas. Published in 1545 a translation of "Vesalius' Anatomy," written and illustrated with copperplates engraved by himself. *HOGENBERG, Francis. Engraved in line a portrait of Queen Mary I. of England, bearing date 1555. (There are doubts as to the correctness of this date.) *HOGENBERG, Remigius. Engraved in line portrait of Matthew (Brother of above.) Parker, Archbishop of Canterbury, bearing date 1573. ROGERS, William. b. London c. 1545. Engraved in line a fine whole-length portrait of Queen Elizabeth, afterwards republished and reduced in size. 17th Cent. *DE PASSE, Crispin. b. Utrecht c. 1560. Line. Engraved and drew from life.