Dr. Niamh McCullagh:

From a recovery respective, Tuam is the single most complex of the sites we have come across to date simply because we are dealing with 20 chambers, each chamber is over 2.7 m to the base where the remains are from the surface and each chamber, in feet, is approximately 9 ft by 1 ft wide so the conditions are extremely challenging. Also, the remains have elements of mixing as opposed to the single graves likely to be come across at other sites like Bessborough and the types of graves we came across at Sean Ross Abbey. They were individual graves as opposed to this scenario where many individuals are interred together in very inaccessible chambers.