Were Richard Aldington and Harold Lamb both writers?
yes
Richard Aldington
Richard Aldington (8 July 1892 – 27 July 1962), born Edward Godfree Aldington, was an English writer and poet.
Harold Lamb
Harold Albert Lamb (September 1, 1892 – April 9, 1962) was an American historian, screenwriter, short story writer, and novelist.
The Republic of Letters
The Republic of Letters was a publishing endeavor by George Routledge & Sons in the mid-1920s in London.
 Edited by William Rose, this series of books focused on interesting and significant poets, dramatists and novelists.
 In addition to containing biographical information, the books also included psychological and social background information of the writer’s own time.
 Certain volumes include "Voltaire" by Richard Aldington, "Pushkin" by Prince D.S. Mirsky, and "Gogol" by Janko Lavrin. The Three Palladins
The Three Palladins is a novel of historical fiction by Harold Lamb.
 It was first published in book form in 1977 by Donald M. Grant, Publisher, Inc. in an edition of 1,350 copies.
 The novel originally appeared in the magazine "Adventure" in 1923. Death of a Hero
Death of a Hero is a World War I novel by Richard Aldington.
 It was his first novel, published by Chatto & Windus in 1929, and thought to be partly autobiographical. H.D.
Hilda "H.D." Doolittle (September 10, 1886 – September 27, 1961) was an American poet, novelist, and memoirist known for her association with the early 20th century avant-garde Imagist group of poets such as Ezra Pound and Richard Aldington.
 She published under the pen name of H.D. Khlit the Cossack
Khlit the Cossack is a literary character created by Harold Lamb for "Adventure" between 1917 and 1926. The Sea of the Ravens
The Sea of the Ravens is a novel of historical fiction by Harold Lamb and illustrators George Barr, and Alicia Austin.
 It was first published in stand-alone book form in 1983 by Donald M. Grant, Publisher, Inc. in an edition of 1,925 copies of which 200 were specially bound and signed by the artists.
 The novel originally appeared in "Adventure" in 1927.
 It was published with its prequel and sequel novels (which had also appeared in "Adventure") with new linking sections by Doubleday in 1931. The Buccaneer (1938 film)
The Buccaneer is a 1938 American adventure film made by Paramount Pictures based on Jean Lafitte and the Battle of New Orleans during the War of 1812.
 It was produced and directed by Cecil B. DeMille from a screenplay by Harold Lamb, Edwin Justus Mayer and C. Gardner Sullivan adapted by Jeanie Macpherson from the novel "Lafitte the Pirate" by Lyle Saxon.
 The music score was by George Antheil and the cinematography by Victor Milner. Life for Life's Sake
Life For Life's Sake: A Book of Reminiscences is a book of memoirs written by Richard Aldington and published by the Viking Press in 1941.
 Chapter IX deals with the early history of Imagism.