In submitting to the public the Memoirs, including the Diaries, of Sir Moses and Lady Montefiore, I deem it desirable to explain the motives by which I have been actuated, as well as the sources from which most of my information has been drawn. The late Sir Moses Montefiore, from a desire to show his high appreciation of the services rendered to the cause of humanity by Judith, Lady Montefiore, his affectionate partner in life, directed the executors of his last will "to permit me to take into my custody and care all the notes, memoranda, journals, and manuscripts in his possession written by his deeply.