MAY. FESTIVAL,.FOURTHMay 18, 19, 20 and 21, 1880..IORCHESTRA 150 PERFORMERS,A larger number than at any preceding Festival. Orchestra and Chorus trained under the personal supervision ofTHEODORE THOMAS, Musical Director.19That the Season Ticket Auction Sale begins MONDAY MORYING, April 19, at 10 o’clock, at COLLEGE HALL. Season Tickets to seven performances will be TEN DOLLARS, and the auction is for premiums above that price for choice of location in the order ofpurchase.