First edition. London, Cassell, 1939 The story centres on the murder of Mr Norwitch found stabbed in an antiques shop. The author worked in an antiques store and clearly draws heavily on this experience. According to authoritative website www.classiccrimefiction.com, UK first editions in original jackets are rare especially this title.
Rare crime title, all other copies I have seen of this title are described as ‘7th Thousand’. London, Skeffington, [1930 according to COPAC] Reasonable to assume this was a publisher gimmick to show titles were popular.