Nigerian playwright of Efik affiliation whose simple and popular plays treating various aspects of African culture and tradition have been widely read and acted in Nigeria. His style has been much imitated by other writers.

A physician by profession, Henshaw was educated at Christ the King College, Onitsha, and received his medical degree from the National University of Ireland, Dublin, before taking up playwriting. One of his first plays, The Jewels of the Shrine, was published in the collection This Is Our Chance: Plays from West Africa (1957). His second collection, Children of the Goddess, and Other Plays (1964), treated such themes as the inefficiency of a local village court because of the drunkenness of its members and the struggle between local authorities and missionaries over the spread of Christianity in a 19th-century Nigerian village. Medicine for Love: A Comedy in Three Acts (1964) is a satire with serious overtones on such matters as a politician's attempt to bribe his way into power and his difficulties with the three prospective wives sent to him by relatives. The comedy Dinner for Promotion (1967) centres on an ambitious young man, a newly rich businessman, and a quarrelsome sister-in-law. Henshaw's later plays include Enough Is Enough: A Play of the Nigerian Civil War (produced 1975) and A Song to Mary Charles (Irish Sister of Charity) (1984).