t photography.

He unscrewed the front of the case and took the camera from its mount.
He hesitated. "Suppose there's enough light down there for color film?"

"There might be," Scotty replied, "but you wouldn't gain much by using
color. Everything would photograph in shades of green. Might as well
have it in shades of gray."

"You've got a point." Rick loaded the camera with fast black-and-white
film and returned it to the case. Then he replaced the cover and
disconnected the compressor long enough to pump pressure into the camera
case. "Ready to go," he announced.

"Take it easy," Scotty said. "We'd better rest a half hour or so. If we
don't knock ourselves out, we can get in three more dives today."

Rick knew the wisdom of that. He adjusted the camera and took a series
of "establishing" shots, to establish that the movie had been taken on a
boat near an island. Then, when the time came to dive, he photographed
Scotty entering the water. At his direction, Scotty got out again, while
Rick got in, swam down a few feet, and took a shot of Scotty entering
from that angle. Then the camera followed as Scotty flippered smoothly
down into the deep water.

Rick followed, camera extended in front of him, sighting through the
gun-type sights mounted on top of the case. There was a handgrip on each
side, with the controls handy to his fingers. By watching the light
meter he could change his exposure as the shifting light required.

He moved ahead of Scotty, panned across the wreck, then reversed the
camera to photograph Scotty approaching. On a hunch, he stood well back
when Scotty approached the underwater entrance and got a picture that
was priceless! The grouper had returned to his home, and frightened by
the light that suddenly probed his hide-out, he flashed out and caught
Scotty by surprise. Scotty dropped his flashlight and back-pedaled
frantically. Grinning, Rick kept his camera grinding. Scotty turned and
saw that Rick was shooting, and held both hands to his face in mock
dismay. Rick cut and secured the camera to an outcropping with its
safety line.

Scotty picked up his light and crawled slowly into the opening. Rick
waited, watching anxiously to be sure his friend's hoses and regulator
cleared the entrance. Then Scotty vanished inside. In a moment he
reappeared, headfirst, and beckoned.

Rick followed him in, his own flashlight extended. It was a little murky
from the grouper's hurried departure, but he saw