With the information provided by Kwok Li (see Miss Rose’s page) we found two items on-line which tell us a bit about the owners of Miss Rose, Theodore and Elsie Crombie:
Publication for sale: “Apollo ~ The Wellington Museum, Apsley House … a reprint of Apollo ~ Vol. XCVIII ~ No. 139, published in September 1973. Contents include scholarly articles on …. “The Legacy of Vitoria : Spanish Paintings at Apsley House”, by Theodore Crombie …”
We also found an item at Christie’s, in a 1992 sale of Spanish Pictures and Drawings: “Sold by Order of the Executors Mexican School, late 18th Century. The Property of the late MR. Theodore Crombie and Mrs Elsie Crombie”.