 The next year he was elected again and served in the final sessions of the provisional government in 1848 and 1849, including time as the speaker of the assembly.In 1850 after Oregon had become a United States territory, Wilcox was elected to the Oregon House of Representatives of the Territorial Legislature, replacing David Hill and served as speaker of the body.The following year he returned representing what had become Washington County, but was not selected as speaker.