Answer the question at the end by quoting:

Jeremy Webster "Fred" Frith (born 17 February 1949) is an English multi-instrumentalist, composer, and improvisor. Probably best known for his guitar work, Frith first came to attention as one of the founding members of the English avant-rock group Henry Cow. He was also a member of the groups Art Bears, Massacre, and Skeleton Crew. He has collaborated with a number of prominent musicians, including Robert Wyatt, Derek Bailey, the Residents, Lol Coxhill, John Zorn, Brian Eno, Mike Patton, Lars Hollmer, Bill Laswell, Iva Bittova, Jad Fair, Kramer, the ARTE Quartett, and Bob Ostertag.
Fred Frith has used a number of different guitars, including homemade instruments, over the years, depending on the type of music he is playing. For the more structured and refined music he has often used a Gibson ES-345, for example on his solo album, Gravity. For the heavier "rock" sound, as in Massacre, he has used an old 1961 solid body Burns guitar, created by the British craftsman Jim Burns. On his landmark Guitar Solos album, Frith used a modified 1936 Gibson K-11 guitar (q.v. for details). For Frith's early unstructured music, as with Henry Kaiser on With Friends Like These, and his early table-top guitar solo performances, he used a homemade six- and eight-string double-neck guitar created by a friend, Charles Fletcher. Frith told DownBeat magazine in 1983: "It was the one and only guitar that he ever built ... he constructed it mainly out of old pieces from other guitars that I had, and for the body I think he used an old door." The possibilities offered by homemade instruments prompted Frith to start creating his own guitars, basically slabs of wood on which he mounted a pickup, a bridge, and strings stretched over metal screws. "The basic design of the instrument is supposed to be as rudimentary and flexible as possible," Frith said, "so I can use an electric drill to bore holes into the body of it to achieve certain sounds ... ." Frith uses a variety of implements to play guitar, from traditional guitar picks to violin bows, drum sticks, egg beaters, paint brushes, lengths of metal chain, and other found objects. Frith remarked: "It's more to do with my interest in found objects and the use of certain kinds of textures which have an effect on the string ... the difference between the touch of stone, the touch of glass, the touch of wood, the touch of paper - those kinds of basic elements that you're using against the surface of the strings which produce different sounds." In a typical solo improvising concert, Frith would lay a couple of his homemade guitars flat on a table and play them with a collection of found objects (varying from concert to concert). He would drop objects, like ball bearings, dried beans, and rice on the strings while stroking, scraping, and hitting them with whatever was on hand. Later he added a live sampler to his on-stage equipment, which he controlled with pedals. The sampler enabled him to dynamically capture and loop guitar sounds, over which he would capture and loop new sounds, and so on, until he had a bed of repeated patterns on top of which he would then begin his solo performance.

What type of guitars did they play?

Fred Frith has used a number of different guitars, including homemade instruments, over the years, depending on the type of music he is playing.

Answer the question at the end by quoting:

Marie Charlotte Carmichael Stopes (15 October 1880 - 2 October 1958) was a British author, palaeobotanist and campaigner for eugenics and women's rights. She made significant contributions to plant palaeontology and coal classification, and was the first female academic on the faculty of the University of Manchester. With her second husband, Humphrey Verdon Roe, Stopes founded the first birth control clinic in Britain. Stopes edited the newsletter Birth Control News, which gave explicit practical advice.
Around the start of her divorce proceedings in 1913, Stopes began to write a book about the way she thought marriage should work. In July 1913, she met Margaret Sanger, who had just given a talk on birth control at a Fabian Society meeting. Stopes showed Sanger her writings and sought her advice about a chapter on contraception. Stopes' book was finished by the end of 1913. She offered it to Blackie and Son, who declined. Several publishers refused the book because they thought it too controversial. When Binnie Dunlop, secretary of the Malthusian League, introduced her to Humphrey Verdon Roe--Stopes' future second husband--in 1917, she received the boost that helped her publish her book. Roe was a philanthropist interested in birth control; he paid Fifield & Co. to publish the work. The book was an instant success, requiring five editions in the first year, and elevated Stopes to national prominence. Married Love was published on 26 March 1918; that day, Stopes was visiting Humphrey Roe, who had just returned with a broken ankle from service during the First World War after his aeroplane crashed. Less than two months later they were married and Stopes had her first opportunity to practise what she preached in her book. The success of Married Love encouraged Stopes to provide a follow-up; the already written Wise Parenthood: a Book for Married People, a manual on birth control that was published later that year. Many readers wrote to Stopes for personal advice, which she energetically endeavoured to give. The following year, Stopes published A Letter to Working Mothers on how to have healthy children and avoid weakening pregnancies, a condensed version of Wise Parenthood aimed at the poor. It was a 16-page pamphlet and was to be distributed free of charge. Stopes's intended audience had--until this work--been the middle classes. She had shown little interest in, or respect for, the working classes; the Letter was aimed at redressing her bias. On 16 July 1919, Stopes--pregnant and a month overdue--entered a nursing home. Stopes and the doctors clashed over the method of birth--she was not allowed to give birth on her knees. The child was stillborn; the doctors suggested the incident was due to syphilis, but an examination excluded the possibility. Stopes was furious and said her baby had been murdered. She was 38 years old.

What is Married Love?
a book about the way she thought marriage should work.