"Can't bust up a ghost that way, Miss Ruth," he returned, beginning to chuckle again.
"Talk sense, Charlie," she urged, forgetting for the moment the subject of the suspicion resting upon Tom Cameron and giving her mind to this other mystery. "You know, I've an idea this foolishness about a white wolf can be easily explained."
"Go ahead and explain," he returned. "I'm free to confess it's got me guessing."
"I believe it is the big greyhound, Bubu, that belongs to the Chateau Marchand. It is sent on errands to and from the frontier."
"Canine spy?" chuckled Charlie.
"I don't know just what he does. But I did think that the old serving woman, Bessie, that the countess brought with her from Mexico so many years ago, knew all about Bubu's escapades. But Bessie is not at the chateau now."
"Oh," said Charlie, "she was the woman who went off with those two crooks who helped your friend, Mrs. Rose Mantel, rob the Red Cross supply department."
"Not my friend, I should hope!" Ruth said sharply, for the matter Charlie touched upon was still a tender subject with the girl.
Her mind dwelt for a moment upon the presence of Major Henri Marchand at the chateau. He was there, and the greyhound, Bubu, was running at large again at night. Was there not something significant in the two facts? But she said nothing regarding this suspicion to the ambulance driver.
Instead, she came back to the subject which had occupied their minds previous to the appearance of the white object that had crossed the road.