Iron deficiency was not proved in five patients who were found to have duodenal ulcer, myelomatosis, giardiasis with partial villous atrophy, hepatocellular carcinoma, and menorrhagia.

Lady Mabel Annesley died of myelomatosis on 19 June 1959 in Clare, Suffolk, and was buried in Long Melford, Suffolk.

From monitoring the Myeloma Trials, the first to describe the natural history of myelomatosis and helped in 1971 to set up the Protein Reference Units which save the national health service £3million each year.