I checked my Iron Elwells and he did not remarry. He is living with his sons in the 1841 census and in the 1851 census, son Charles and 2 of his Bingham sisters-in-law are with him, so not very likely that he ever remarried. He had a daughter Mary, who married a John Elwell. Perhaps this is the Mary if the Thomas is indeed the Thomas Elwell of Wolverhamapton. These Elwells are my family. Have you anything that states that these pictures are for certain of the Thomas Elwell of Compton Hall? I do find it curious that 2 paintings would be in the US if this is the Thomas Elwell of Compton Hall who concocted (borrowed?) our family crest from the extinct Baronetcy of Elwill.