!["It had a man's body, with the legs and scales of some great lizard."](http://upload.wikimedia.org/wikipedia/commons/thumb/3/33/Weird_Tales%2C_Volume_10%2C_Issue_04_-_A_Problem_of_the_Dark.png/400px-Weird_Tales%2C_Volume_10%2C_Issue_04_-_A_Problem_of_the_Dark.png)
"It had a man's body, with the legs and scales of some great lizard."
THE Dennison home is a quiet, roomy place, neither new nor old. It has wide, kindly spaces; the walls smile at you.
The house has many closets, but not a skeleton in any of them—and as for ghosts, no one has ever died there.
There is no luxury, and equally, no mystery—not at all the place to tempt a night-marauding visitor, from this or any other world; and Mollie Dennison, its gentle mistress, finds it strange that her husband should be so insistent, of late, about having every door and window on the first floor tightly locked every night. Only last summer, many of them were commonly left open, and even when he forgot to hook the screens, he laughed at her for remonstrating.
What caused this change in him, she is never to know; so John Dennison has vowed to himself, to his son Robert, and to his friend Dr. Hedges.
"A woman couldn't know a thing like that!" he has told them.
At breakfast, on that day, late in the previous summer, which he is never to forget, he had asked Mollie casually, "Robert up yet?"
"Yes—or he was; he's lying on the couch in the library and he wants to see you before you go; he said wouldn't you please come in?"
"Nonsense! Why doesn't he come to the table?"
"John, dear, the boy's sick; and
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