Sailors, and keepers of sailor boarding houses--attention! : A lecture on sailors' rights will be delivered by Henry A. Mayenborg, and the Liberty House, 41 Almond St. on Monday evening, Dec. 21st, 1863, at 8 o'clock, precisely. All sailors of the U.S. Navy, keepers of sailor boarding houses, and others interested in the welfare of the sailor, are respectfully invited to attend. Admission, free