Question: Who wrote the biography of American poet Ralph Waldo Emerson?

Context articles: Raymond Emerson
Emerson Community Charter School
Ronald A. Bosco
Jeffrey S. Cramer
Mary Moody Emerson
Ralph Waldo Emerson House
Charles Johnson Woodbury
Boston Hymn
Alexander Ireland (journalist)
Ralph Waldo Emerson

Raymond Emerson (November 28, 1886 - 1977) was a civil engineer, an investment banker, and faculty at the Peabody Museum of Archaeology and Ethnology.
 He is known for his large donations of personal Ralph Waldo Emerson letters and other documents for educational purposes.
 He was part of the Emerson family, Ralph Waldo Emerson's grandson.
 In addition to his marriage to Amelia Forbes, he was also connected to the Forbes family through other marriages in his parent's and his own generations.
Ralph Waldo Emerson Community Charter School (formerly Ralph Waldo Emerson Middle School and commonly referred to as Emerson) is a charter middle school in the Los Angeles Unified School District in Westwood, Los Angeles, California, United States.
 It was designed by famed architect Richard Neutra and was named in honor of Ralph Waldo Emerson, the American author, poet, and philosopher.
Ronald A. Bosco (born in Farmingdale, New York) is the Distinguished Professor of English and American Literature at the University at Albany, State University of New York, is currently President of the Association for Documentary Editing and General Editor of "The Collected Works of Ralph Waldo Emerson" published by Harvard University Press.
 Bosco is one of the country’s leading experts on the works of Ralph Waldo Emerson and on American Puritan homiletics and poetics.
Jeffrey S. Cramer (born 1955) is the Curator of Collections at the Thoreau Institute at Walden Woods Library, managing the collections of the Walden Woods Project, the Thoreau Society, and the Ralph Waldo Emerson Society.
 He has edited many books about the works of such American literary figures as Ralph Waldo Emerson, Henry David Thoreau, and Robert Frost.
Mary Moody Emerson (August 23, 1774 - May 1, 1863) was known not only as her nephew Ralph Waldo Emerson’s “earliest and best teacher,” but also as a “spirited and original genius in her own right” (Richardson on back cover of "Origins").
 Ralph Waldo Emerson considered her presence in his life a “blessing which nothing else in education could supply” (Emerson "Lectures" 432); and her vast body of writing—her thousands of letters and journal entries spanning more than fifty years—“became one of Emerson’s most important books” (Richardson 25).
 Her surviving documents reveal the voice of a “woman who […] had something to say to her contemporaries and who can continue to speak to ours” about “the great truths that were the object of her life’s pilgrimage” (Cole "Origins" xl, xxvii).
The Ralph Waldo Emerson House is a house museum located at 18 Cambridge Turnpike, Concord, Massachusetts, and a National Historic Landmark for its associations with American philosopher Ralph Waldo Emerson.
 He and his family named the home Bush.
 The museum is open mid-April to mid-October; an admission fee is charged.
Charles Johnson Woodbury (15 September 1844 - 13 May 1927) was a lecturer on poetry & literature.
 He was a student of Ralph Waldo Emerson and wrote the book "Talks With Ralph Waldo Emerson".
"Boston Hymn" (full title: "Boston Hymn, Read in Music Hall, January 1, 1863") is a poem by the American essayist and poet Ralph Waldo Emerson.
 Emerson composed the poem in late 1862 and read it publicly in Boston Music Hall on January 1, 1863.
 It commemorates the Emancipation Proclamation issued earlier that day by President Abraham Lincoln, tying it and the broader campaign for the abolition of slavery to the Puritan notion of sacred destiny for America.
Alexander Ireland (1810–1894) was a Scottish journalist, man of letters, and bibliophile, notable as a biographer of Ralph Waldo Emerson as well as a friend of Emerson and other literary celebrities, including Leigh Hunt and Thomas Carlyle, as well as the geologist and scientific speculator Robert Chambers.
 His own most popular book was "The Book-Lover's Enchiridion", published under a pseudonym in 1882.
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.