Notices of the receipt at the postoffice of registered letters, containing tickets for the Yale game, addressed to students living in that part of Cambridge supplied by the Cambridge station of the Boston postoffice, will be sent out beginning this afternoon. The letters will not be delivered by the carriers, but must be called for-personally at the postoffice. The notices of arrival at the postoffice of the registered letters will not be accepted as sufficient means of identification, and students must therefore be prepared to identify themselves with their Bursar's cards, H. A. A. tickets, etc. In order to facilitate the rapid delivery of the letters, men are earnestly requested to call for registered letters an soon as the notice of their arrival at the postoffice is received. The postoffice will be open for the delivery of registered letters from 8 A. M. to 6 P. M.