"Give me the key of the orchid-house!" said Dr. Cairn tersely.
"Orchid-house!—"
"Don't hesitate. Don't waste a second. Give me the key."
Saunderson's expression showed that he thought Dr. Cairn to be mad, but nevertheless he plunged his hand into his pocket and pulled out a key-ring. Dr. Cairn snatched it in a flash.
"Which key?" he snapped.
"The Chubb, but—"
"Follow me, Rob!"
Down the hall he raced, his son beside him, and Mr. Saunderson following more slowly. Out into the garden he went and over the lawn towards the shrubbery.
The orchid-houses lay in dense shadow; but the doctor almost threw himself against the door.
"Strike a match!" he panted. Then—"Never mind—I have it!"