"Not wishing to be seen, we stepped aside among the trees and waited.
"The man came on up the path, and by the moonlight which struggled through the branches of the trees we saw that he was carrying a great sack.
"I instantly suspected that some crime was afoot. My first thought was that this was a grave-robber carrying a body.
"I supposed that he had brought the body to the shore of the river in a boat, and was carrying it to one of the doctors in the hospital.
"We allowed him to pass us, and then we followed him. He went to the wall surrounding the hospital grounds.
"Choosing a place where there is a bank of rubbish against the wall, he lifted the sack to the top. Then I knew that it could not contain a dead body."
"How did you know that?" asked Nick.
"Because he lifted it so easily. What was in the sack I do not know, of course. There was some crooked business about it, I have no doubt, but it was not a body that he had there, because, by the way he handled it, I saw that it could not weigh over fifty pounds, and the sack was too large to have only a child's body in it."
"What did you do?"
"We watched him lay the sack on top of the wall, and then climb up. He dropped the sack into the garden, and let himself down from the wall. We paid no further attention to the matter.