“Try it yourself,” replied Mabel.
Shirley advanced and laid hold of the knob, but the door would not open.
The girls looked at each other in alarm.
“I never heard that they always locked the doors in Mexico,” said Mabel.
“Nor I,” agreed Shirley. “Do you suppose it was an accident?”
“I don’t know what to think,” replied Mabel.
There was no denying the fact that both girls were badly frightened. They darted hither and thither about the room, seeking a means of egress; but there was none and they finally sat down.
“It must have been an accident,” said Shirley at last. “Surely Mrs. Sebastian would have no reason for wishing to keep us prisoners.”
“That’s what I think,” Mabel agreed. “The door must have locked itself.”
“Well, all we can do is wait for some one to return,” said Shirley.