them across the chart to the compass rose. “A course of two hundred True will put us over the hundred-fathom curve about forty miles south of where the dinghy was found. From there we could fly an east-west pattern out over the Channel and back in over the Bank with about ten-mile spacing.”
“Right,” Avery agreed. He rolled up the chart and they went out to where the big amphibian squatted on the apron in white sunlight. There were three seats on each side of the narrow aisle in the after compartment. “Who’d like the co-pilot’s seat?” Avery asked, with a hopeful glance at Mrs. Osborne. “Visibility’s much better up there.”
She nodded to Ingram. “Your eyesight’s probably better than mine at this sort of thing. I’d rather you took it.”
“Okay.” He followed Avery through the narrow doorway. They strapped themselves in. Avery started the engines, taxied out to the end of the runway, and called the tower for clearance. The engines roared, and they began to gather speed. Then they were airborne and climbing in a long turn toward Andros.
* * *
The blue chasm of the Tongue of the Ocean passed beneath them, and then the coral-toothed white surf of the barrier reef along Andros’ eastern shore. The interior of the largest island of the Bahamas chain was a green mat of vegetation broken only by meandering creeks and great marshy lakes dotted with mangroves. The plane came out at last over the desolate west coast where the land shelved almost imperceptibly into the vast shallow seas of the Bahama Bank and the patterns of sand bars were like riffled dunes beneath the surface. Ahead and on both sides the horizon faded into illimitable distance, merging finally with the sky with no line of demarcation and seeming to move forward with their progress so that they remained always in the center. It was only by looking down at the varying terrain of the bottom and the shifting patterns of color that it was possible to tell the plane was moving at all. The colors themselves were indescribable, Ingram thought; you had to see them to realize they could be that way, and he didn’t believe that anybody ever entirely forgot them afterward. He wondered if Mrs. Osborne was enjoying them. He glanced aft, and she was leaning back in the seat with her eyes closed, smoking a cigarette. Well, maybe nobody’d ever told her it was an expensive ocean.
Andros faded away astern and they were alone above the immensity of the sea. Another thirty minutes went by. Then, a little over an hour after their take-off from Windsor Field, Avery said, “We should be coming up on the area now.”
Ingram nodded. Ahead, just emerging from the haze of distance, was the long line sweeping across the horizon where the delicate shades of turquoise and powder blue and aqua changed abruptly to indigo as the western edge of the Bank plunged into the depths of the Santaren Channel. He stepped into the after compartment. Mrs. Osborne opened her eyes, and he pointed out the small window next to her seat.
She nodded, removed the binoculars from their case, and slung them about her neck. He bent down so as not to have to shout above the noise of the engines, and said, “I wouldn’t try to use those too much. With this vibration, they’ll pull your eyes out.”
“All right,” she said. She turned back to the window. Ingram returned to the co-pilot’s seat. He unrolled the chart, penciled a mark on it where their course intersected the hundred-fathom curve, and set a clip-board in his lap.
As they came over the drop-off, Avery banked in a gentle right turn, steadied up on the new course, and checked the time. “Two-seven-oh,” he said. “Ten twenty-six.”
“Right.” Ingram wrote the figures on the pad attached to the clip-board without looking down as his eyes continued their search of the surrounding sea—ahead, starboard, out to the horizon, and below. The wind was out of the southeast with a light sea running, dotting the surface