Question: What year was the historian and author who maintained the Helmshore Mills Textile Museum knighted?

Context paragraphs:
Helmshore Mills Textile Museum: Helmshore Mills are two mills built on the River Ogden in Helmshore, Lancashire.  Higher Mill was built in 1796 for William Turner, and Whitaker's Mill was built in the 1820s by the Turner family.  In their early life they alternated between working wool and cotton.  By 1920 they were working shoddy as condensor mule mills; and equipment has been preserved and is still used.  The mills closed in 1967 and they were taken over by the Higher Mills Trust, whose trustees included Chris Aspin, the historian and author and Dr Rhodes Boyson who maintained it as a museum.  The mills are certainly the most original and best preserved examples of both Cotton Spinning and Woollen Fulling left in the country which are still operational.

Lewis Textile Museum: The Lewis Textile Museum was bequeathed to the people of Blackburn by a local cotton industrialist, Thomas Boys Lewis (1869–1942).  The Lewis Textile Museum was closed in 2006 and a new gallery with its collection of looms and textile machinery was moved to Blackburn Museum and Art Gallery.  The gallery which now houses the exhibits at the main Museum & Art Gallery was named "CottonTown" and opened in April 2007 by Jack Straw, the local Labour MP.

Museum of Textile in Česká Skalice: The textile museum in Česká Skalice is the only Czech museum specialized in the history of textile production.  Its displays and collections represent a unique body of work reflecting the development of textile industry, especially cloth printing, in the Czech Republic and abroad.  The museum, a branch of the Museum of Decorative Arts in Prague, holds regular exhibitions.

American Textile History Museum: The American Textile History Museum (ATHM), located in Lowell, Massachusetts, was founded as the Merrimack Valley Textile Museum (MVTM) in North Andover, Massachusetts in 1960 by Caroline Stevens Rogers.  ATHM told America’s story through the art, science, and history of textiles.  In June 2016, the museum closed.

Bhutan Textile Museum: The Bhutan Textile Museum or the National Textile Museum is a national textiles museum in Thimphu, Bhutan, located near the National Library of Bhutan.  It is operated by the National Commission for Cultural Affairs.  Since its establishment in 2001, the museum has generated national and international attention and has garnered a substantial collection of antique textile artefacts, exclusive to Bhutan.

Rhodes Boyson: Sir Rhodes Boyson (11 May 192528 August 2012) was a British educator, author and politician; Conservative Member of Parliament for Brent North.  He was knighted and made a member of the Privy Council in 1987.

Fashion and Textile Museum: The Fashion and Textile Museum, based in Bermondsey, London, is the only museum in the UK solely dedicated to showcasing developments in contemporary fashion, as well as providing inspiration, support and training for those working in the industry.  Founded by British designer Zandra Rhodes in 2003, the museum is part of the Newham College of Further Education – one of Europe's largest further education colleges.  Recent exhibitions at the museum have included; Liberty in Fashion, Art Textiles, 1920s Jazz Age Fashion & Photographs and Missoni Art Colour.  Rather than running a permanent exhibition, the Fashion and Textile Museum offers an ongoing programme of temporary displays, including current exhibition, The World of Anna Sui, which runs until October 2017.

Textile Museum (Washington, D.C.): The Textile Museum reopened in March 2015 as part of The George Washington University Museum and The Textile Museum on GW's main campus in Foggy Bottom.  The museum was founded by collector George Hewitt Myers in 1925 and was originally housed in two historic buildings in D.C.'s Kalorama neighborhood: the Myers family home, designed by John Russell Pope, and an adjacent building designed by Waddy Wood.

Prato textile museum: The Campolmi Factory, the Prato textile museum and Lazzerini Library is a textile museum and library in Prato in Tuscany, Italy.

Textile Museum Sarawak: The Textile Museum Sarawak (Malay: "Muzium Tekstil Sarawak" ) is a textile museum in Kuching, Sarawak, Malaysia.

Supporting paragraphs: Helmshore Mills Textile Museum Rhodes Boyson
Answer: 1987