The rhine : or, a journey from Utrecht to Francfort; chiefly by the borders of the Rhine, and the passage down the river, from Mentz to Bonn: described in a series of letters, written from Holland, to a Friend in England, in the years 1791 and 1792. In two volumes. By T. Cogan, M. D. Embellished with Twenty-Four Views in Aqua Tinta, and a Map of the Rhine from Mentz to Bonn