[43] PAGE 7, LINE 21. Page 7, line 28. _echeneidis._--The _echeneis_, or sucking-fish, reputed to have magical or magnetic powers, is mentioned by many writers. As an example, see Fracastorio, _De Sympathia et Antipathia_, lib. i., cap. 8, _De Echineide, quomodo firmare nauigia possit_ (Giunta edition, Venet., 1574, p. 63). For other references to the _Echeneis_ see Gaudentius Merula (_op. citat._) p. 209. Also Dr. Walter Charleton, _Physiologia Epicuro Gassendo-Charltoniana_ (Lond., 1654), p. 375. Compare p. 63, line 3. [44] PAGE 7, LINE 33. Page 7, line 43. _Thomas Hariotus_, etc.--The four Englishmen named were learned men who had contributed to navigation by magnetic observations. Harriot's account of his voyage to Virginia is printed in Hakluyt's _Voyages_. Robert Hues (or Hood) wrote a treatise _on Globes_, the Latin edition of which appeared in 1593 (dedicated to Sir Walter Raleigh), and the English edition in 1638. It was republisht by the Hakluyt Society, 1889. Edward Wright, the mathematician and writer on navigation, also wrote the preface to Gilbert's own book. Abraham Kendall, or Abram Kendal was "Portulano," or sailing-master of Sir Robert Dudley's ship the _Bear_, and is mentioned in Dudley's _Arcano del Mare_. On the return of Dudley's expedition in 1595, he joined Drake's last expedition, which sailed that year, and died on the same day as Drake himself, 28 January, 1596. (See _Hakluyt_, ed. 1809, iv., p. 73.) [45] PAGE 7, LINE 36. Page 8, line 1. _Guilielmus Borough._--Borough's book has the title: _A Discours of the Variation of the Cumpas, or magneticall {20} Needle. Wherein is Mathematically shewed, the manner of the obseruation, effectes, and application thereof, made by W. B._ And is to be annexed to _The Newe Attractive_ of R. N., 1581 (London). [46] PAGE 7, LINE 37. Page 8, line 2. _Guilielmus Barlo_.--Archdeacon William Barlowe (author, in 1616, of the _Magneticall Aduertisements_) wrote in 1597 a little work called _The Navigators Supply_. It gives a description of the ordinary compass, and also one of a special form of meridian compass provided with sights for taking the bearings by the sun. [47] PAGE 7, LINE 37. Page 8, line 3. _Robertus Normannus_. See Note to p. 5. [48] PAGE 8, LINE 14. Page 8, line 21. _illo fabuloso Plinij bubulco_.--The following is Pliny's account from Philemon Holland's English version of 1601 (p. 586): "As for the name Magnes that it hath, it tooke it (as _Nicander_ saith) of the first inventor and deviser thereof, who found it (by his saying) upon the mountaine Ida (for now it is to be had in all other countries, like as in Spaine also;) and (by report) a Neat-heard he was: who, as he kept his beasts upon the aforesaid mountaine, might perceive as he went up and downe, both the hob-nailes which were on his shoes, and also the yron picke or graine of his staffe, to sticke unto the said stone."