Question: Which correspondent of Frederick Goddard Tuckerman was an American essayist, lecturer, and poet who led the transcendentalist movement of the mid-19th century?

Context articles: History of Bridgeport, Connecticut
Josephine Lazarus
Mulberry Hill (Randolph, Virginia)
Henry David Thoreau
Frederick Goddard Tuckerman
Poet's Seat Tower
Caroline Healey Dall
Lidian Jackson Emerson
Ralph Waldo Emerson
Walter Tuckerman

The history of Bridgeport, Connecticut was, in the late 17th and most of the 18th century, one of land acquisitions from the native inhabitants, farming and fishing.
 From the mid-18th century to the mid-19th century, Bridgeport's history was one of shipbuilding, whaling and rapid growth.
 Bridgeport's growth accelerated even further from the mid-19th century to the mid-20th century with the advent of the railroad, Industrialization, massive immigration, labor movements until, at its peak population in 1950, Bridgeport with some 159,000 people was Connecticut's second most populous city.
 In the late 20th century, Bridgeport's history was one of deindustrialization and declining population, though it overtook Hartford as the state's most populous city by 1980.
Josephine Lazarus (23 March 1846 - 1910) was an American essayist, book critic, transcendentalist, and Zionist.
Mulberry Hill is a historic plantation house located near Randolph, Charlotte County, Virginia.
 The original section dates to the 18th century and forms the slightly projecting, gable-end, two-story front center pavilion.
 Flanking this center section are single-bay two-story wings added in the mid-19th century.
 At the same time, a two-story rear wing was added.
 The front facade features a mid-19th century porch with a full Doric order entablature supported on octagonal Doric columns.
 Also on the property are the contributing Judge Paul Carrington's office building, a brick kitchen, a frame spinning house, a dairy, a smokehouse, a privy, and servants' quarters.
 It was the home plantation of 18th century political official and jurist Paul Carrington (1733–1818).
 He is buried on the plantation grounds.
Henry David Thoreau (see name pronunciation; July 12, 1817 – May 6, 1862) was an American essayist, poet, philosopher, abolitionist, naturalist, tax resister, development critic, surveyor, and historian.
 A leading transcendentalist, Thoreau is best known for his book "Walden", a reflection upon simple living in natural surroundings, and his essay "Civil Disobedience" (originally published as "Resistance to Civil Government"), an argument for disobedience to an unjust state.
Frederick Goddard Tuckerman (February 4, 1821 – May 9, 1873) was an American poet, remembered mostly for his sonnet series.
 Apart from the 1860 publication of his book "Poems", which included approximately two-fifths of his lifetime sonnet output and other poetic works in a variety of forms, the remainder of his poetry was published posthumously in the 20th century.
 Attempts by several 20th century scholars and critics to spark wider interest in his life and works have met with some success and Tuckerman is now included in several important anthologies of American poetry.
 Though his works appear in 19th century anthologies of American poetry and sonnets, this reclusive contemporary of Emily Dickinson, sometime correspondent of Nathaniel Hawthorne, Ralph Waldo Emerson and Henry Wadsworth Longfellow, and acquaintance of Alfred, Lord Tennyson, remains in relative obscurity.
Poet's Seat Tower is a 1912 sandstone observation tower, located in Greenfield, Massachusetts.
 It was so named to honor a long tradition of poets being drawn to the spot, in particular, the local poet Frederick Goddard Tuckerman.
 By 1850, the location was referred to as "Poet's Seat" by Tuckerman in a surviving herbarium entry for November 10th of that year.
Caroline Wells Healey Dall (June 22, 1822 – December 17, 1912) was an American feminist writer, transcendentalist, and reformer.
 She was affiliated with the National Women's Rights Convention, the New England Women's Club, and the American Social Science Association.
 Her associates included Elizabeth Peabody and Margaret Fuller, as well as members of the Transcendentalist movement in Boston.
Lidian Jackson Emerson (September 20, 1802 - November 13, 1892) was the second wife of American essayist, lecturer, poet and leader of the nineteenth century Transcendentalism movement, Ralph Waldo Emerson, and mother of his four children.
 An intellectual, she was involved in many social issues of her day, advocating for the abolition of slavery, the rights of women and of Native Americans and the welfare of animals, and campaigned for her famous husband to take a public stand on the causes in which she believed.
Ralph Waldo Emerson (May 25, 1803 – April 27, 1882) was an American essayist, lecturer, and poet who led the transcendentalist movement of the mid-19th century.
 He was seen as a champion of individualism and a prescient critic of the countervailing pressures of society, and he disseminated his thoughts through dozens of published essays and more than 1,500 public lectures across the United States.
Walter Rupert Tuckerman (1881-1961) was an American lawyer, banker, golfer, and philanthropist.
 Tuckerman founded the Bank of Bethesda in Bethesda, Maryland and served as its first president.
 He also led development of the Edgemoor neighborhood of Bethesda.
 Tuckerman was a direct descendent of Oliver Wolcott, a signer of the United States Declaration of Independence.
 He was also a cousin of horse rider Bayard Tuckerman, Jr., an inductee into the National Racing Hall of Fame.