Question: Which British poet's writings were the basis for In the Region of the Summer Stars?

Context paragraphs:
Charles Williams (British writer): Charles Walter Stansby Williams (20 September 1886 – 15 May 1945) was a British poet, novelist, playwright, theologian, literary critic, and member of the Inklings.

James Byrne (poet): James Byrne is a British poet, translator and Editor of "The Wolf" magazine.  He was born in Buckinghamshire in 1977.  His most recent poetry collections include "Everything Broken Up Dances", published by Tupelo Press in the United States and "White Coins", both in 2015.  Other published collections include "Blood/Sugar" by Arc Publications in 2009, He has also published pamphlets, including "SOAPBOXES" and "Myth of the Savage Tribes, Myth of Civilised Nations", a collaborative work with the poet Sandeep Parmar.  For many years James has been consistently talked of as 'one of the leading poets of his generation', endorsed by The Times as one of the 'ten rising stars of British poetry' in April 2009.  He lives in England after two years in New York City, where he received a Stein scholarship and an MFA from New York University.  He was the Poet in Residence at Clare Hall, University of Cambridge from 2011-2012 and is a Lecturer at Edge Hill University where he teaches poetry.

In the Region of the Summer Stars: In The Region Of The Summer Stars is progressive rock band The Enid's debut album.  It is based on the tarot sequence and on the writings of Charles Williams.  It was released in 1976 by EMI.  A new version was released on the band's own label in 1984 following its deletion from the EMI catalogue.  In 2010, to forestall an alleged bootleg version, EMI licensed the original version to the band's own label.

Dennis Wilson (poet): Dennis B. Wilson (born 1920 or 1921) is a British poet known mainly for his writings as a soldier in World War II.  Poems he wrote during the 1944 Normandy landings were published for the first time in 2012 by Kultura Press with the assistance of Tim Crook, a researcher at Goldsmiths College who was working on a biography of his father, the writer and spy Alexander Wilson.

The Five Sacred Trees: John Williams composed The Five Sacred Trees for Judith LeClair, the principal bassoonist of the New York Philharmonic in 1995, to honor the orchestra's 150th anniversary.  The first performance was given by LeClair and the New York Philharmonic under Kurt Masur on April 12 of that year.  The orchestra consists of three flutes and piccolo, two oboes and English horn, two clarinets and bass clarinet, two bassoons and contrabassoon, four horns, three trumpets, three trombones and tuba, timpani, harp, piano, celesta, and strings.  Performance time is approximately 26 minutes.  Inspiration for the work also comes from the writings of British poet and novelist Robert Graves.

Matthew Francis: Matthew Francis (born 1956 in Hampshire, United Kingdom) is a British poet, editor of W. S. Graham's "New Collected Poems", and a professor at the University of Wales, Aberystwyth.  His status as a contemporary British poet is well known.  In 2004, Francis was included on the Poetry Book Society's list of the 20 best modern poets as selected by a panel chaired by poet laureate Andrew Motion.  He is revered for his impressive wordplay and sharp imagination, and his beautifully elegant phrasing makes him a very popular poet.

The Firebringer Trilogy: The Firebringer Trilogy is a fantasy series written by Meredith Ann Pierce.  The first novel, Birth of the Firebringer was published in 1985, followed by Dark Moon in 1992, and concluding in The Son of Summer Stars in 1996.  Well remembered for Pierce's rich use of language, the series fell out of print in the early 90s, and began commanding high prices online.  The series was re-published in paperback by Firebird Books in 2003.

Delphinium grandiflorum: Delphinium grandiflorum is a species of "Delphinium" known by the common names Siberian larkspur and Chinese Delphinium.  It is native to Russia and China.  There are several popular cultivars in several colours which are grown as ornamental plants, including 'Blue Butterfly', 'Summer Morning', 'Blue Mirror', and 'Summer Stars'.  Like many other larkspurs, this plant is poisonous.  It is much shorter and more compact than the more familiar tall "D. elatum", with dispersed flowers, rather than single spikes.

J. C. Squire: Sir John Collings Squire (2 April 1884 – 20 December 1958) was a British poet, writer, historian, and influential literary editor of the post-World War I period.  His writings mostly discuss common experiences.

A Choice of Kipling's Verse: A Choice of Kipling's Verse, made by T. S. Eliot, with an essay on Rudyard Kipling is a book first published in December 1941 (by Faber and Faber in UK, and by Charles Scribner's Sons in U.S.A.).  It is in two parts.  The first part is an essay by American-born British poet T. S. Eliot (1888-1965), in which he discusses the nature and stature of British poet Rudyard Kipling (1865-1936); it is divided into two sections.  The second part consists of a selection of Kipling's poems made by Eliot.

Supporting paragraphs: In the Region of the Summer Stars Charles Williams (British writer)
Answer: Charles Williams