For the record, Alistair has 2 cats. One is called Opuss and the other Clawvisfurballistibum.
The first statement here is correct. The second, however, whilst mildly amusing, is incorrect in both particulars. That said, Prof. Paul Rapoport, the Canadian musicologist who edited and contributed handsomely to the first full-length study of Sorabji, did once have a cat whom he called Opus (Opus Ampersand, to cite her full name); she lived for almost 20 years and is the dedicatee of that book (
Sorabji: A Critical Celebration; Scolar Press [now Ashgate Publishing], Aldershot, UK; 1992, repr. 1994).
Best,
Alistair