30 dedicated gardening enthusiast. My last criticism is to do with the conservation of plants worldwide; much of the beauty of Beth Chatto's garden is provided by "species" plants (i.e. not cultivated varieties) from the temperate regions of the world. A recent report in Oryx (Vol. 23), the Journal of the Flora and Fauna Preservation Society, underlines the increasing problem of wild collected plants, particularly bulbs, from various countries. Turkey is singled out. From here tens of millions of wild collected bulbs are exported annually threatening native stocks of some species. So, if you do buy "species" plants (in particular those with bulbs) buy them from a reputable nursery such as Beth Chatto's that propagate their own plants and always enquire as to the origin of the stock you are buying. It would have been good in such a book to have had at least a passing reference drawing this particular problem to the reader's attention. MARK HANSON Recent Books to Help with Identification One area which has long required an iden- tification guide is feathers. "Tracks and Signs of the Birds of Britain and Europe" by Brown, Ferguson, Lawrence and Lees, published by Helm at £17.95 provides an illustrated guide to single discarded specimens. The main character used is their length coupled with