In the TV series "M*A*S*H",when Radar went home after his Uncle Ed died, what did he leave on Hawkeye's cot?

At the end of the episode Goodbye Radar, Hawkeye, BJ and Colonel Potter go to The Swamp for a drink after a long day of surgery. They are talking and wondering where Radar is at that moment. Colonel Potter notices the teddy bear on Hawkeye's bed and brings it to Hawkeye's attention. Hawkeye picks it up and says "Goodbye Radar".

Gary Burghoff, who played Walter "Radar" O' Reilly was the only actor to reprise his role from the movie M*A*S*H to the TV series and he was the last original cast member to leave the series. The three remaining original cast members Alan Alda, Loretta Swit and William Christopher remained with the series until the end. Jamie Farr, Cpl. Klinger, appeared as a recurring character in several episodes in the first season but did not become a series regular until the second season.