The literature documenting the decline in distribution of the polecat (Mustelo putorius), Pine marten (Martes martes) and Wild cat (Felis silvestris) in Great Britain during the nineteenth century is surveyed, and a series of maps to illustrate the declines is presented. These highlight the different patterns of decline in the three species, and draw attention to the parallels in certain birds of prey. The declines do not match the decline in woodland, which was largely completed before they began. They do coincide with the development of the sporting estate, and moreover the differences between the species can partly be explained by differences in persecution. 96 P. J. W. Lungley and D. W. Yalden and Wild cat,Felis silvestris. Moore (1957) has documented this decline in one species, the buzzard, and by using maps to portray his information, summarized a large amount of factual data in a most useful and assimilable form. This has prompted us to try to provide similar treatment for the three mammals already mentioned.There are, of course, obvious pitfalls in attempting such a venture; the poor documentation of mammals when compared with birds, the possibilities of confusion, (especially of Wild cat and tabby, or polecat and ferret) and the general uncertainties of whether records isolated in time or geography should be accepted at face value. However, these uncertainties are now historical, and delaying the project will not resolve them. There is, meanwhile, a considerable body of information which is available, though perhaps less and less readily so as time passes. Bringing it together in map form has drawn attention to the remarkable parallels to the situation incertain birds of prey, and to the differences between the three mammals. It also provokes some reexamination of the causes of the decline, which may not be irrelevant to the conservation interests of the present time.
SOURCESThe Victoria County Histories (V.C.H.) covering most of the English Counties, together with Harting (1878, 1891a, 1891b), and Millais (1904), provide much information. For Wales, Forrest (1907, 1908, 1921 presented many data, and Matheson (1932) gave a useful summary. For Scotland, similar services were performed by Harvie-Brown and his co-worker Buckley (Harvie-Brown,