Very interesting, gentlemen. I confess I thought Gen'l Clarke was a Texan as we named a highway after him. But he's from New York. Here is an Oral history interview with him and after reading it, He was pretty crusty... be sure to notice he said he tied himself into a jeep and had no sleep other than in that jeep for 7 days of St Vith...I think the only reason Gen'l Ridgeway got away without needing to have two hand grenades surgically removed from his nether regions after tangling with him is that Clarke must have been just as sick as you describe.
http://www.trumanlibrary.org/oralhist/clarkeb.htm