| 1500-1599 | 'Next to [John] Balgrave's modest prefatory poem [in "The Mathematical Jewel" (1585)] "The Authour in his own defence"... | Gabriel Harvey | John Blagrave | The Mathematical Jewel, Shewing the making, and most excellent use of a singuler Instrument so called ... The use of which Jewel ... leadeth ... through the whole Artes of Astronomy, Cosmography, Geography, Topography, Navigation, Longitudes ... | Print: Book |