William St. Clair Tisdall (1859–1928) was a British Anglican priest, linguist, historian and philologist who served as the Secretary of the Church of England's Missionary Society in Isfahan, Persia.
Tisdall was the principal at the Training College in Amritsar and later was the missionary in charge of the C.M.S.
[2] Clinton Bennett, in his Victorian Images of Islam (1992), paints Tisdall as a confrontationalist perpetuating a traditional Christian anti-Muslim polemic.
In reviewing the compilation, religious studies professor Herbert Berg panned the inclusion of Tisdall's work as "not a particularly scholarly essay".
[4] Tisdall accuses Muhammad of inventing revelations according to what he believed to be the need of the moment.