Three Cent Letter Rate Nov, 2

On and after November 2, 1917, letters mailed in Cambridge for delivery through any post office outside the Boston Postal District must bear three cents in postage for each ounce or fraction thereof. United States postal cards must have one cent in postage affixed in addition to the stamp printed thereon. This rate applies to any address. Private post cards bearing written inscriptions must also have two cents in postage affixed. The Boston Postal District within which the rate on first class matter will remain unchanged, includes Boston and towns in the immediate vicinity.