This enormous undertaking, which, according to one of the prefaces, professes to be a complete list of every bird known at the time of publication, kept growing even as it was being written. The Museum added eagerly to their already vast collections during the decades of publication, acquiring by gift the great collections of A.O. Hume on Asian birds, and those of Sclater and Salvin and Godwin on Neotropical birds, so that the size of the collection nearly tripled between 1874 and 1888. Sharpe originally intended to do all the work himself, but others were called in when this became clearly impossible. The plates are all of birds not previously illustrated. In the decades following its publication this catalogue was universally acclaimed as the most important work on systematic ornithology that has ever been published. (Zimmer, p. 96). And even after one hundred years it remains an essential reference for the serious ornithologist, as it underpins a great deal of modern bird classification. With 387 plates, most hand-coloured lithographs, some chromolithographs, by William Hart, J.G. Keulemans, Joseph and Peter Smit.