Rubuta ci gaba don wannan sakin layi - Thomas ya gayyaci Bragdon ya koma California a 1915, inda Bragdon ya fara koyarwa a Makarantar Arts da Crafts (CSAC) a Oakland. Bragdon ya koma iyalinsa zuwa Berkeley daga St. Louis a lokacin rani na 1915. Thomas da Bragdon tare sun mai da hankali kan samar da tukwane da tayal don baje kolin kasa da kasa na Panama-Pacific na 1915 (PPIE)
a birnin San Francisco. An yi yarjejeniyar haɗin gwiwa a ranar 9 ga Nuwamba, 1915 kuma an sanya hannu kan yarjejeniyar haɗin gwiwa a ranar 30 ga Mayu, 1917.