For many years past Mr Mogridge, of the Winchester Museum, has been indefatigable in collecting Lower Palaeolithic flint implements from a number of gravel pits lying between the villages of Warsash and Hook, in the district of the Lower Hamble river, Hampshire. From time to time he has brought up selected specimens to meetings of the Prehistoric Society in London, and exhibited them to members at the conclusion of the formal lectures. These Warsash finds are extremely numerous, show very fine workmanship, and exhibit certain special features which make them of exceptional importance to all students of Lower Palaeolithic cultures in England. Some time ago I suggested to Mr Mogridge that his valuable finds ought to be placed more permanently on record. He at once consented to the writing of a joint article for our Proceedings, and placed all his information at my disposal. Together we visited the sites, examined the sections, and talked to the workmen, from whom, of course, most of the implements are in the first instance obtained. I also consulted with my former pupil, and now colleague, Mr T. T. Paterson, and he very kindly consented himself to study the Quaternary geology on the spot, and to write a brief account. The drawings are from my wife's pen.