who is he?
He was an American Romantic poet, critic, editor, and diplomat.
James Russell Lowell
James Russell Lowell (; February 22, 1819 – August 12, 1891) was an American Romantic poet, critic, editor, and diplomat. He is associated with the Fireside Poets, a group of New England writers who were among the first American poets that rivaled the popularity of British poets. These writers usually used conventional forms and meters in their poetry, making them suitable for families entertaining at their fireside.

writer of the inventor who kept his promise James Russell Lowel.
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James Russell Lowell [SEP] Introduction
The couple had several children, though only one survived past childhood. He became involved in the movement to abolish slavery, with Lowell using poetry to express his anti-slavery views and taking a job in Philadelphia, Pennsylvania, as the editor of an abolitionist newspaper. After moving back to Cambridge, Lowell was one of the founders of a journal called "The Pioneer", which lasted only three issues. He gained notoriety in 1848 with the publication of "A Fable for Critics", a book-length poem satirizing contemporary critics and poets. The same year, he published "The Biglow Papers", which increased his fame. He went on to publish several other poetry collections and essay collections throughout his literary career.