The title is a pun on the religious organization Knights Templar
The Saint has found himself back in Britain and again on the trail of arms dealer Marius. While executing a scheme to root Marius out from hiding by infiltrating a bogus nursing home, Templar and his associate Roger Conway rescue who they initially think is an elderly man held prisoner by one of Marius' compatriots Templar soon discovers that they've actually rescued the beautiful daughter of a millionaire upon whose safety relies world peace.
Written by Leslie Charles Bowyer-Yin (1907-1993)
Hodder and Stoughton
October 1930as The Avenging Saint