Fair question: the edition we all probably used was edited and revised
by Sir James Mountford. I've lost my old copy, and the one I have now
(thank _you_, Oxfam: glad to have helped) was printed in 1957.
Mountford lived through most of the 20th C, so a feeling tells me he
didn't write the "verses" in the Appendices. I doubt if Kennedy ever
published any serious verse: these rather forced mnemonics are there
only to help children, and some were quite successful. For my part, I
needed such jewels as:
"With ablative:
"A, ab, absque, coram, de,
Palam, clam, cum, ex, and e,
Sine, tenus, pro and prae;
Add super, subter, sub and in,
When 'state,' not 'motion,' 'tis they mean."
(Note the bard's uncertainty about the Oxford comma.)
I don't think there was an other reviser between K and M: the Latin
Prose composition book we suffered was "Mountford's Kennedy's
Bradley's Arnold", which suggested the busy Sir James was the man they
went to for Kennedy-polishing.
--
Mike.