In time, Arthur married and moved to Donnybrook, a fruit-growing town in southwest Western Australia. There he was nicknamed “Old Mad 1914!” because of his zealous proclamation of Bible prophecies pointing forward to that year.d The teasing stopped when World War I broke out. Arthur regularly witnessed to customers in a store that he owned, where he displayed Bible literature prominently in the window. The window also displayed a sign that offered 100 pounds to anyone who could prove the Trinity​—an unscriptural doctrine that Arthur firmly rejected. No one ever collected the money.

The Williams’ home became a focal point for group Bible study and congregation meetings in Donnybrook. Later, Arthur built a Kingdom Hall, or meeting place, in town​—one of the first in Western Australia. Well into his 70’s, he would don a suit and tie, saddle up his old horse named Doll, and go preaching far and wide throughout the Donnybrook district.