"Never Swim Alone. Most drownings occur among people who know how to swim well enough to get into trouble but not to get out of it. Obeying a few simple safety rules may save your life. The first and most important is: Never swim alone. It is always best to swim in pairs, but even so don't travel far from shore unless there's a boat along. If you get caught in a current, don't try to buck it. Swim diagonally across with the flow, even though you land far downstream. If the current flows directly outward from shore, save your strength by drifting with it calmly and shouting and waving for help."
Good Reading Rack Service, 1958