A Mosaic of Islands. By Kenneth Williamson and J. Morton Boyd. Oliver & Boyd, Edinburgh and London, 1963. 183 pages index; 22 black-and-white photographs; text-drawings and m - p s . 21s. The more remote islands around our coast have always held a great fascination for naturalists. It is now four hundred years since Donald Monro wrote the MS. for his Description of the Western Isles of Scotland, eventually published in 1774; and since then we have had many books about them, varying in style from the quaint and somewhat uncritical pen of Martin Martin to the splendid, humorous and descriptive Island Going of Robert Atkinson. This new book by the authors of St. Kilda Summer (1962) is a further and most welcome addition to the literature. With general descriptions of various Scottish islands and the Faeroe Islands, it contains much useful information on their ecology and on the birds, seals and whales. The authors take it in turn to contribute individual chapters: on the Faeroe Islands; on the research work being carried out by the Nature Conservancv in the 'p-reat onen-air lahnratorv' on R h u m : on experiences in assessing seal populations on various Hebridean islands and on North Rona in particular; on the early primitive dwellings on Hirta and Boreray of the St. Kilda g r o u p ; and a general one on various small islands visited by the National Trust for Scotland's 'Islands Cruise', which also covers a trip to Unst in Shetland.