It was brown and egg-shaped. He sniffed. Its odor was medicinal, not identifiable. He decided that it was something Harry must have taken just before his death, something the police hadn’t noticed the day before because they were looking for nothing of that sort. He went to his room to get an envelope and tipped in the capsule without touching it. He finished cleaning the room thoroughly, and then, for the sake of the family and their memories, he rearranged the furniture.
After that, with the envelope in his breast pocket, Duff went outdoors. He knew now that the Yates place was being watched and he thought he could locate the agent on duty. He walked clear around the large rectangle of roads by which the property was bounded.
At the back of the property three Negroes were busy in a languid, hot-afternoon fashion, clearing the overgrown edges of the paved street. There was no one else. He then decided the watcher was hidden in the woods, and entered them. The undergrowth was thick and he went cautiously, as he was very sensitive to poisonwood, which abounded in the hammock around the house. He passed the platform where Eleanor had found the box again.
The G-men had it now. Platinum. He thought of that and shrugged.
He came, finally, to the sinkhole. It was about twenty feet one way and thirty the other, overhung by big trees, with a big tree blown across it, and deep enough to contain water. Such sinkholes, common in Dade County, were caused by the eating out of soft limestone by underground water. When a pocket was thus formed its roof eventually collapsed. Most such “glades” were dry, but some, like this one, had been deeply eroded and held pools of dark water.
Duff looked in. The water, gleaming in the shade, reached back out of sight beneath great, thirsty roots and an overhang of limestone encrusted with fossil shells. Around its rim were faint signs of visitation. Kids came there occasionally — though forbidden by their parents— to catch minnows in traps or just to throw stones for the sake of the splash. The water was too shallow for drowning, but a person could have a nasty fall into it.
Looking down, Duff remembered the night he’d seen one of the mysterious boxes — if there had ever been “one” among many — in his own homemade lily pool. That thought led to another: the sinkhole reached back out of sight around its rim, and he was wearing old clothes. He could go back to the house for a rope or use a tree. He decided on a tree and found a suitable one nearby, a small palm uprooted by the October blow. He scrambled down it and landed high-deep, in warm water.
The bottom was mucky. Overhead was an oval of blue sky. Around him, the sides of the hole curved back and the water glinted in gloom. Sometimes, he recalled, there were alligators in these sinks. He saw none. He walked around the edges, peering into the recesses, stirring up mud.
Presently he came to an area, hidden from above by the overhang, which had been visited by somebody else. Perhaps by several people. And perhaps often. It was a kind of roofed room, open toward the pit; its muddy floor emerged as a soft bank. The bank showed many signs of feet — old markings and some probably not very old. There were flat marks, too, where boards had evidently sunk down into the mucky sediment. One or two boards were visible now, and he located another with his foot, then others. They’d settled beneath the surface of the ooze.
The footprints weren’t plain, except for one, which he studied. It was the mark of the side of a man’s shoe. The man evidently had fallen on the tarlike stuff. But his leg, curiously enough, had left no print. Duff decided that the man must have turned his ankle to make such a mark.