Just beyond the whited boundary lay the slipcatch, mown all around, but little used, tall grass growing up through its silvery slats. Peter liked the shape of it, like some archaic boat, and sometimes on evening walks by himself he lay down in it and blew cigarette-smoke at the midges overhead. … Paul had found a cricket ball in the long grass, and stepping back a few yards he threw it swerving through the dip of the slipcatch and up into the air, where no one of course was waiting to receive it—it bounced once and ran off quickly towards the old parked roller, leaving Paul looking both smug and abashed.
It would seem to be a cricket term, and the OED indeed has an entry for “slip-catch”—but there it clearly means a way of catching a ball rather than a piece of terrain (1903 S. L. Jessop in H. G. Hutchinson Cricket v. 119 “This range [of hits for practising catches] will include different kinds of chances, from ‘slip’ catches to catches in the long field”). The very few other Google Books hits seem to have entirely different meanings (“On Bob’s belt was a set of keys hanging from a belt loop by one of those slipcatch hooks with a ring on it”; “he drew back the slipcatch of the garden door and opened it”; “By means of a slipcatch it holds the line firmly”; etc.). Anybody know what it means here? Is it simply a slip on the author’s part?