The chest was inherited by the owner from his aunt, who was Wallis' neighbour, and it contained numerous pictures on cigarette packets, painted newspaper clippings and tin lids.
All are unseen since Wallis's death and believed to be the last works that he produced whilst in Madron work house.
Six will be sold in Barnes Thomas' October 18 sale, with estimates ranging from £1000 to £4000. Pictured here is Steamer in Rough Sea on an OXO tin lid, estimated at £3000-4000.
For catalogue see www.barnesthomas.co.uk