Onahan finds it out of the question for him to attend the meeting tomorrow. Mayor Crezier, who returned yesterday from Springfield, must return this evening on important public business that cannot be delayed, and since Onahan is by office next in authority, he cannot in his absence absent himself even for a day. Also he has been named to act in forwarding donations for the sufferers of the Johnstown calamity and every available moment must be given to this work of duty and charity. He is confident that this is suficient explanation and reason for his unavoidable absence. He thinks he omitted the name of Daniel J. Foley of Baltimore, to whom he sent an invitation, from his list. :: III-3-c A.L.S. 2pp. 8vo.