The reference to James Colvin being crushed by a filing cabinet full of manuscripts is what made me suspicious. A quick net-search and turns out that James Colvin was an alter-ego of New Worlds editor Michael Moorcock, developed for certain stories. Then it became a "house pseudonym"  used by others writers at the magazine. (Particularly when giving negative reviews of s.f. books -- presumably to avoid recriminations). Colvin's obituarist here, William Barclay, is another Moorcock pseudonym.