William St. Clair Tisdall

William St. Clair Tisdall (1859–1928) was a British historian and philologist who served as the Secretary of the Church of England's Missionary Society in Isfahan, Persia.

William St. Clair Tisdall was fluent in several Middle Eastern languages including Arabic, and spent much time researching the sources of Islam and the Qur'an in the original languages. He also wrote grammars for Persian, Hindustani, Punjabi and Gujarati.

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