Josephus Flavius Cook

[2] A descendant of Pilgrims, Cook started his ascent to fame by way of Monday noon prayer meetings in Tremont Temple in Boston that for more than twenty years were among the city's greatest attractions.

In the lectures, Cook attempted to convey recent developments in European science and philosophy in a way that reconciled them to Protestant belief; his commentary stressed social amelioration and civic responsibility.

[2] In 1871, Cook's work exposing the poor conditions in factories in Lynn, Massachusetts was publicly praised by Mary Baker Eddy, the founder of The First Church of Christ, Scientist,[3] however, Cook later became a noted critic of Eddy and her ideas.

Eddy responded with a pamphlet, later expanded into the book No and Yes which opposed Cook's views on the subject.

Eddy also spoke at one of Cook's Tremont Temple lectures in defense of Christian Science.