More accurate publication dates for H.C. Andrews’ The Heathery, particularly volumes 5 and 6

Using three types of evidence—dated watermarks; dates of flow ering of Erica L. species in cultiv ation in England: dates on which Andrews prepared the original drawings—it is concluded that the six volumes of Henry Charles Andrews’ The Heathery were published as follows: volume 1. not earlier than June 1805; volume 2. not earlier than 1806: volume 3. 1806; volume 4, 1807; volume 5, not before 1816; volume 6. late in 1828 Consequently, most, if not all. of Andrews' new names for Erica species were first published in Coloured engravings of heaths..