Their sale "Private Press & Limited Editions, Children’s & Illustrated Books,
Original Artwork and Performing Arts" (on 26 April 2007 at 11.00am and 2.00pm) will include some material which may be of interest to Tolkien collectors:

508. Tolkien (J.R.R.) .The Adventures of Tom Bombadil, first edition, illustrations by Pauline Baynes, some full-page, original pictorial boards, slightly rubbed at corners, dust-jacket, frayed at spine ends, closed tear and crease to head of upper panel, 8vo, 1962.
Estimates £100 - £150

509. Tolkien (J.R.R.) .The Lord of the Rings, first 1 vol. india paper
edition, folding maps, original black buckram decorated in gilt, silver & green, small light mark to upper cover, slip-case, rubbed, 8vo, 1969.
Estimates £300 - £400