Cyril P. Callister called Vegemite, first sold by Fred Walker & Co in 1923. Working from the details of a James L. Kraft patent, Callister was successful in producing processed cheese. The Walker Company negotiated a deal for the rights to manufacture the product, and in 1926, the Kraft Walker Cheese Company Ltd was established. Callister was appointed chief scientist and production superintendent of the new company. Between 1919 and 1927 he had 3 children (two boys and a girl) named Ian, Bill and Jean. They were the original vegemite kids. During World War II Ian unfortunately died Callister got his Doctorate from
Charles Warren Callister the product itself. This is evident in his use of natural materials and expressive wood joinery, reminiscent of Arts & Crafts architects Greene and Greene. The Flowers Residence in Berkeley is such an example. Callister was an active researcher and educator throughout his career. During the 1960s he lectured at Stanford University, Syracuse University, Columbia University, University of Colorado, and University of British Columbia. He was the recipient of the Award of Excellence, Urban Land Institute, 1982 and the prestigious Award of Honor, San Francisco Art Commission, 1983. Callister died in Novato, California on April 3, 2008. The Charles Warren