John W. Carter (c.1836-1903) was born in Enfield, New Hampshire, and died in Watertown, Massachusetts. Carter, a dentist, and his wife, Sarah, were members of Mary Baker Eddy's Primary class of August 20, 1883, but were dismissed after three lessons. The Carters had initially prepared to take a class with one of Eddy's students, Edward H. Hammond. Eddy felt Hammond was not qualified to teach Christian Science so she offered to teach them for the same price that Hammond charged ($50). But Eddy and the Carters had not agreed on the cost of the tuition, so when Eddy asked them to pay $50 (a reduction from her usual fee of $300), they refused and were dismissed from the class.

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