[3] They later collaborated on writing songs for revues, performed by such artists as Max Adrian, Elsie and Doris Waters, Ian Carmichael and Joyce Grenfell.

"[7] In The Observer, Kenneth Tynan called the show "a witty and educated diversion … Mr. Swann, bent over his piano like a small mad scientist agog over some wild experiment, ideally complements the bearded suavity of Mr. Flanders, who exudes from his wheelchair the robust authority of him who came to dinner.

"[8] Other notices were equally good, the box-office did excellent business, and the show transferred to the Fortune Theatre in the West End on 24 January 1957, where, according to The Times, "it took the audience by storm".

[11] In the New York Herald Tribune Walter Kerr wrote, "Whatever it is that runs through both these gentlemen's veins it makes them lively, witty, literate, ingratiating, explosively funny and excellent company for a daffy and delightful evening".

[12] The two-man show was performed with Flanders in a wheelchair (as a result of polio contracted in 1943) and Swann at a grand piano on an otherwise empty stage.

[14] Each performance ended with the "Hippopotamus" song, in which the audience was encouraged to join in, followed, in Britain, by a musical rendition of the Lord Chamberlain's regulations.

Two substantial CD sets have been assembled drawing on these, and the original EMI recordings, together with a 1974 BBC radio programme in which the writers revived some of their neglected numbers.