A Tour Through Italy. Containing Full Directions for Travelling in that Interesting Country; with Ample Catalogues of Every Thing that is Curious in Architecture, Painting, Sculpture, &c. Some Observations on the Natural History, and Very Particular Descriptions of the Four Principal Cities, Rome, Florence, Naples, and Venice, with Their Environs. With a Coloured Chart. By Thomas Martyn, B.D. F.R.S. Professor of Botany in the University of Cambridge