James Robert Thompson, Jr. (born May 8, 1936), also known as Big Jim Thompson, was the 37th and longest-serving Governor of the US state of Illinois, serving from 1977 to 1991.
 A Republican, Thompson was elected to four consecutive terms and held the office for 14 years.
 Many years after leaving public office, he served as a member of the National Commission on Terrorist Attacks Upon the United States (the 9/11 Commission).
Two Arabian Knights (1927) is an American comedy film, directed by Lewis Milestone and starring William Boyd, Mary Astor and Louis Wolheim.
 A silent film, "Two Arabian Knights" was produced by Howard Hughes and was distributed by United Artists.
 The screenwriters were James T. O'Donohue, Wallace Smith, and George Marion Jr.
Hoppy Serves a Writ is a 1943 Western film directed by George Archainbaud and starring William Boyd as Hopalong Cassidy.
 The supporting cast features Andy Clyde, Victor Jory and George Reeves.
 The film remains noteworthy today as one of the earliest performances (his 3rd) of unshaven newcomer Robert Mitchum, who made an impression upon the studio by generating a surprising fan mail response exactly as Clark Gable had after playing an extremely similar unshaven role in "The Painted Desert", a Western starring William Boyd produced a dozen years earlier.
Hop-Along Cassidy is a 1935 American western film, featuring the character "Hop-Along Cassidy" created by writer Clarence E. Mulford.
 This is the first of 66 "Hopalong Cassidy" films produced between 1935 and 1948 and all starring William Boyd in the title role.
 William Boyd was originally offered the role of Buck Peters, the ranch foreman, but decided to take the role of Hop-Along instead.
National Stadium station (Thai: สถานีสนามกีฬาแห่งชาติ ; RGTS: Sanam Kila Haeng Chat) is a BTS Skytrain station, on the Silom Line in Pathum Wan District, Bangkok, Thailand.
 The station is located on Rama I Road to the west of Pathum Wan intersection, where the National Stadium, MBK Center, Siam Discovery Center, Bangkok Art and Culture Centre and Siam Square are situated and all linked to the station by skybridge.
 It is also in walking distance to Siam Center and Siam Paragon, which are located at Siam Station.
 Jim Thompson House, popular Thai silk museum of Jim Thompson, is just opposite the station on Soi Kasemsan 2.
William Boyd, CBE (born 7 March 1952) is a Scottish novelist and screenwriter.
The Jim Thompson House is a museum in central Bangkok, Thailand, housing the art collection of American businessman and architect Jim Thompson, the museum designer and former owner.
 Built in 1959, the museum spans one rectangular "rai" of land (approximately half an acre or 2023.43 meters).
 It is one of the most popular tourist destinations in Thailand; sporting vibrant jungle foliage in the heart of the city.
Boyd's Windmill, also known as Boyd's Wind Grist Mill, is a historic smock mill at Paradise Valley Park on Prospect Avenue in Middletown, Rhode Island.
 John Peterson built the windmill on Old Mill Lane in Portsmouth, Rhode Island in 1810, and William Boyd purchased it in 1815.
 It originally had four common sails, but four more were added by the family.
 The mill is a timber-frame structure, octagonal in shape, and about 30 ft tall, with a rotating cap powered by eight vanes with canvas sheets.
 The grindstones in the middle of the mill are Fall River granite; the upper one, which is connected to the power mechanisms, rotates six times for each turn of the mill's main shaft.
 In 1916 Benjamin Boyd removed the original vanes and powered the mill using a gasoline engine.
 It is one of only two windmills (out of what was estimated to be more than thirty) to survive on Aquidneck Island.
James Myers Thompson (September 27, 1906 – April 7, 1977) was an American author and screenwriter, known for his hardboiled crime fiction.
William Boyd Carpenter was the second son of the Revd Henry Carpenter of Liverpool, perpetual curate of St Michael's Church, Aigburth, who married (marriage licence 1837 in Derry) Hester Boyd of Derry, sister of Archibald Boyd, Dean of Exeter.
 Her father was Archibald Boyd (born about 1764 of Saint Leonards, Shoreditch, London, England), who married Sarah Bodden there on 13 July 1789.

Question: Were William Boyd and Jim Thompson both screenwriters?
Answer: yes