It is Thursday, the 23rd, and Chester Kemp is having a lapse of memory. Thursday, the 23rd, and he is on Flight 652.Flight 652, Swissair for....

He has the window seat. Below him, gray fields, small towns. Anonymous towns. Patches of snow. He is high over....

Germany. Of course, Germany. He is on the Stockholm flight. Chester Kemp settles back in his seat. A sigh of relief. An annoying task ahead, but good to have it all snap into focus again. Arrive Stockholm 5:33 P.M. and locate his brother by 6:30.Take him out to a decent dinner. Have a little talk. Set him straight. To bed early and up early the next morning. Take the 6:10 flight down to Milan in time for a day of conferences. A tight schedule but possible. All reservations confirmed if only the weather holds.