Whakaotihia te rerenga e whai ake nei: I waenganui i te tau 1913 me te tau 1926, i noho te whānau Williamson ki Berkeley me ngā wāhi 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 whakaaturia tana mahi tā monotype i te 1915
Panama-Pacific International Exhibition (PPIE) i te United States Section, i tautokohia e te San Francisco Art Association.