Drawings by the Suffolk artist John Constable which were discovered at a house in Michigan will be sold at auction on 3rd July.
The works were collected by the late Jasper Moore.
The drawings, which haven't been seen on the market for 50 years, will be sold by the Bonhams auction house.
Two views of the grounds of Hedingham Castle in Essex appear to be unrecorded.
Mr Moore began collecting works of art during World War II while stationed in California and was still collecting up until his recent death aged 90.