No one really knew. It was all pure guesswork.
The two scientists meant to spend the entire summer trying to solve this riddle for all time, concentrating on it to the exclusion of everything else. They drove west in a station wagon stuffed with equipment and tracking a U-Haul-It packed with more.
George drove, on a road that was only two sand tracks across the wild empty desert between Casa Grande Monument and Tonto National Monument where cliff dwellers had lived. It was here, not far ahead, in new ruins that were being excavated, that they hoped to solve the secret of the exodus of the prehistoric Indians. The place was known as the Hohokam Dig.
They topped a rise of ground and came to the site of the dig. Here the sand tracks ended right in the middle of long trenches dug out to reveal thick adobe walls. In the partially bared ruins the outline of a small village could be seen; the detailed excavation would be done this summer by workmen who would arrive from Phoenix and Tucson.
George stopped their caravan and the two men got out, stretching their legs. They looked about, both more interested in the dig, now they were back at it, than setting up camp. They walked around, examining various parts of it, and the excitement of the promise of things to be discovered in the earth came to them. "This summer we'll learn the answer," Sidney predicted.
With skeptical hope George replied, "Maybe."
It was early afternoon when they set up camp, getting out their tent from the U-Haul-It. They took out most of their gear, even setting up a portable TV set run on batteries brought along. They worked efficiently and rapidly, having done this many times before and having their equipment well organized from long experience. By the middle of the afternoon all was ready and they rested, sitting on folding chairs at a small table just outside the opening of their tent.
Looking around at the dig Sidney remarked, "Wouldn't it be easy if we could talk to some of the people who once lived here?"
"There's a few questions I'd like to ask them," said George. "I certainly wish we had some to talk with."