Only six of the seven trophies taken from the Stanford B.A.C. building last Thursday night by Berkeley invaders were returned by express this afternoon, it was announced by B.A.C. officials. The trophy not received is a rowing cup awarded to Stanford in 1909, and valued at $250. All the trophies were in good condition with the exception of one. A handle had broken on this cup, presumably as a souvenir. The cups had been packed by a packing company in Berkeley and were sent collect by express. On the outside of the carton containing them was printed "Contents -- Hardware, Value $50." According to Al R. Masters, manager of the B.A.C., the actual value of the package was approximately $400.