It was in the middle of the nineteenth century that the site of Ur was identified and the excavation of its ruins begun by G. E. Taylor, consul at Basra, acting on behalf of the British Museum. A number of antiquities was brought back to London, but the unsensational character of the finds in southern Mesopotamia caused them to be overshadowed by the striking discoveries then being made in the northern mounds, and work was abandoned, not to be resumed until the Great War put the British in temporary possession of the country and gave it a fresh interest in the eyes of the public. In the latter part of the war Mr. R. Campbell Thompson, working for the British Museum, made soundings at Ur, but did not carry out extensive excavations; in 1919 Dr. H. R. Hall was sent out by the Trustees and began a systematic investigation of the site, employing a considerable force of men for nearly three months, and obtaining important results. Dr. Hall's work made it evident that if the site of Ur was to be tackled seriously, a whole series of campaigns extending over many years and involving very heavy outlay would be required, campaigns to which the post-war finances of the British Museum were by no means adequate. Fortunately the Trustees were at this juncture able to join forces with the Museum of the University of Pennsylvania, and it was decided that an expedition should take the field at the joint expense of the two institutions, which should also share with the Iraq Government in the material results of the work. Of this joint expedition I was asked to take charge. Mr. F. G. Newton came as architect of the party, Mr. Sidney Smith of the British Museum dealt with the inscriptions, and at the end of the year we were joined by Mr. A. W. Lawrence. Hamoudi, my Carchemish foreman, was put in charge of the men; the actual labourers were the Muntafik Arabs of the district. Digging started at the beginning of November and went on without interruption, owing to an unusually clement winter, until halfway through February.