artists Johannes Vermeer, Pieter de Hooch, and Rembrandt. He began exhibiting again in 1960. About this time he and his wife established a second home on the Caribbean island of St. Maarten. In 1961, Bearden joined the Cordier and Ekstrom Gallery in New York City, which would represent him for the rest of his career. In the early 1960s in Harlem, Bearden was a founding member of the art group known as The Spiral, formed "for the purpose of discussing the commitment of the Negro artist in the present struggle for civil liberties, and as a discussion group to consider common aesthetic problems." The first meeting was held in Bearden's studio on July 5, 1963, and was attended by Bearden, Hale Woodruff, Charles Alston, Norman Lewis, James Yeargans, Felrath Hines, Richard Mayhew, and William Pritchard. Woodruff was responsible for naming the group The Spiral, suggesting the way in which the Archimedean spiral ascends upward as a symbol of progress. Over time the group expanded to include Merton Simpson, Emma Amos, Reginald Gammon, Alvin Hollingsworth, Calvin Douglas, Perry Ferguson, William Majors and Earle Miller. Stylistically the group ranged from Abstract Expressionists to social protest painters. Bearden's collage work began in 1963 or 1964. He first combined images cut from magazines and colored paper, which he would often further alter with the use of sandpaper, bleach, graphite or paint. Bearden enlarged these collages through the photostat process. Building on the momentum from a successful exhibition of his photostat pieces at the Cordier and Ekstrom Gallery in 1964, Bearden was invited to do a solo exhibition at the Corcoran Gallery of Art in Washington, D.C. This heightened his public profile. Bearden's collage techniques changed over the years, and in later pieces he would use blown-up photostat photographic images, silk-screens, colored paper, and billboard pieces to create large collages on canvas and fiberboard. In 1971, the Museum of Modern Art held a retrospective exhibition of Bearden's work, which traveled to the University Art Museum in Berkeley, California. The City of Berkeley then commissioned Bearden to create a mural for the City Council chambers. The sixteen-foot-wide mural, incorporating many visual aspects of the city in collage style, was installed in late 1973 and received positive reviews. It was taken down and loaned to a National Gallery of Art Bearden retrospective in 2003 that traveled to the San Francisco Museum of Modern Art, the Dallas Museum