It's the old Phantom of the Opera formula in this tedious, transparent ""Old West"" mystery. Lola Field Mouse, who plays a sort of Lily Langtry to Pete Pack Rat's Judge Roy Bean, is coming to perform at Pebble Junction's dance hall--haunted with the usual ghostly voices. After much gasping and many good gollies, Sheriff Sally Gopher discovers the culprit is Hattie Squirrel, who hid in the cellar after a disastrous performance years ago and joins Lola for a comeback in the all's well denouement. The dialogue--""What a relief! . . . You can say that again. . . . What a relief!"" is as tired as the plot, and the illustrations are stale and unamusing. Quackenbush has been down this trail before: head him off at the pass.