One I didn't find at Sorcha's site was "Baa Baa Black Sheep" which I believe he did with Daws Butler, about the McCarthy hearings of the late 40's.

If memory serves, and 50 year old memories often don't, the lyrics resembled a congressional inquiry/persecution of a black sheep with suspected communist tendencies, interspersed with interludes from "March of the Gladiators", a tune specifically associated with circuses, especially clowns, in the USA.

Dave