Was phillis wheatley best know for writing poetry in free verse?

Phillis Wheatley was one of the best-known poets in pre-19th century America. Educated and enslaved in the household of prominent Boston commercialist John Wheatley, lionized in New England and England, with presses in both places publishing her poems, and paraded before the new republic's political leadership and the old empire's aristocracy. 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.