Answer:
Published in London in 1773.
Step-by-step explanation:
Although scholars had generally believed that An Elegiac Poem, on the Death of that Celebrated Divine, and Eminent Servant of Jesus Christ, the Reverend and Learned George Whitefield ... (1770) was Wheatley’s first published poem, Carl Bridenbaugh revealed in 1969 that 13-year-old Wheatley—after hearing a miraculous saga of survival at sea—wrote “On Messrs. Hussey and Coffin,” a poem which was published on 21 December 1767 in the Newport, Rhode Island, Mercury. But it was the Whitefield elegy that brought Wheatley national renown. Published as a broadside and a pamphlet in Boston, Newport, and Philadelphia, the poem was published with Ebenezer Pemberton’s funeral sermon for Whitefield in London in 1771, bringing her international acclaim.
By the time she was 18, Wheatley had gathered a collection of 28 poems for which she, with the help of Mrs. Wheatley, ran advertisements for subscribers in Boston newspapers in February 1772
Hope this helps! :)