Tuhia he whakamāramatanga mō tēnei wāhanga - I waenganui i te tau 1913 me te tau 1926, i noho te whānau Williamson ki Berkeley me ngā taha o te Tai Rāwhiti. I te tau 1914, he kaainga tuarua ta raua i Carmel, California, i taua tau ano ko te niupepa New York Times i tapaina a Williamson ko tetahi o nga kaitoi "mohiotanga" o Carmel. I whakaatuhia tana mahi taarua monotype i te 1915 Panama-Pacific International Exhibition
(PPIE) i te United States Section, i tautokohia e te San Francisco Art Association.