What was the limerick's final line?

[review]

Among the pages of Christopher Hitchens's 2010 memoir, Hitch-22, that I read this morning, was a passage about a limerick "appeal" that a journalist had made in the New Statesman. I've decided to borrow the appeal and pass it on to my readers.
    The original appeal provided only the first line, but I'll provide all but the last. Here's why:

Tom Driberg in the last years of his life was still a true legend on the journalistic and cultural left. In youth, he had been an original member of Evelyn Waugh's Brideshead set, while also maintaining good relations with the more radical forces clustered around W.H. Auden and Stephen Spender. He had, indeed, given the young Auden his first copy of The Waste Land, and joined him in reading it aloud...Anyway, he was sometimes invited to contribute the "Londoner's Diary" to the New Statesman, and one week issued an appeal to readers to help him complete an indecent limerick the first line of which ran: "There once was a man of Stoke Poges." This highly respectable town in Buckinghamshire seemed to cry out for the rhyme "poke Doges," which in turn meant that the remainder of the limerick would have to be Venetian in flavor.
    Fenton and I [poet James Fenton], assisted by our dear friend Anthony Holden, accepted the challenge and were duly invited to a lunch by old Tom held at the Quo Vadis restaurant in Dean Street, above which Karl Marx had once kept his squalid lodgings. How we completed the task I don't entirely remember ("entirely resolved to poke Doges. So this elderly menace / Took steamship to Venice..." But what was the last line?). At all events [I continue quoting beyond what's necessary simply in able to get to Hitchens's mention of the actor who played Lawrence of Arabia; like Frank Harris, Hitchens seems to have known everybody]...

Left hand panel from
Francis Bacons' 1966 triptych
Three Studies for a Portrait
of Muriel Belcher

At all events, by the time the restaurant had finally insisted on throwing us out—this in the days when the pubs in London were not allowed to stay open in the afternoon—Tom simply took me down the street and up a flight of dingy stairs and made me a member of the infamous "Colony Room Club," an off-hours drinking establishment run by a tyrannical Sapphist named Muriel Belcher. Renowned to this day for its committed members, from Peter O'Toole to Francis Bacon, the joint at that epoch gave off an atmosphere of inspissated gloom, punctuated by moments of high insobriety and low camp.... [pp. 151-152]

Anyway, I invite you to submit your nomination for what the final line of the limerick concocted by Mssrs. Driberg, Hitchens, Fenton, and Holden might have been:

There once was a man of Stoke Poges,
Entirely resolved to poke Doges.
    So this elderly menace
    Took steamship to Venice....
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