This book is the earliest work in English devoted to tropical medicine. It discusses sunstroke, tabardilla (possibly typhus or yellow fever), prickly heat, dysentery, erysipelas and scurvy. Facsimile reproduction, with introduction and notes by Charles Singer, Oxford, 1915. Because the author is identified only as G. W. on the title page for a long time authorship of this work was attributed to George Whetsone, an Elizabethan poet, soldier, and traveller. More recently authorship has been assigned to George Wateson, who signed the dedication. Little is known about Wateson.