Notices of the receipt at the post-office of registered letters, containing tickets, for the Harvard-Yale football game, addressed to students living in that part of Cambridge supplied by the Cambridge station of the Boston post-office, will be sent out beginning today. The letters will not be delivered by carriers, but must be called for personally at the postoffice. These 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 requested to call for registered letters immediately on the receipt of the notice of their arrival at the postoffice which will be open for the delivery of registered letters from 8 A. M. to 6 P. M.