"It is the door leading into the College Gardens. How came it open?"
"Have you a key?"
"I suppose there is a key on the old rusty bunch hanging up in the Museum, but I do not know—I have never tried the keys. Who could have opened it?"
Christine walked down the Gallery hastily, Mildred following. The door was standing wide open.
"Who has done this?" asked Christine, again. "I cannot tell who could have opened the door, or why. It has never been opened before."
Mildred shuddered. "It is thrown open for some mischief," she said; "we shall find out soon enough by whom."
Then they looked out through the door into the Garden of the College. The door faced a semicircular lawn run wild with rank grass never shorn; behind the lawn were trees; and the moonlight lay on all.
Suddenly the girls caught hands and shrank back into the door-way, for a tall form emerged from the trees and appeared upon the lawn, where he walked with hanging head and hands clasped behind his back.
"It is the Arch Physician!" Christine whispered.
"It is Harry Linister," Mildred murmured.