subs. (old).See quot.
1823. GROSE, Classical Dictionary of the Vulgar Tongue [EGAN], s.v. ANCHOR. Bring your ase to an ANCHOR, i.e., sit down. To let go an ANCHOR to the windward of the law; to keep within the letter of the law. Sea wit.
1853. REV. E. BRADLEY (Cuthbert Bede), The Further Adventures of Mr. Verdant Green, II. iii. Hullo, Pet! BRING YOURSELF TO AN ANCHOR, my man. The Pet accordingly ANCHORED himself by dropping on to the edge of a chair.