William George Taylor (born 1822) joined the firm of Michael and Arthur O'Connor in 1873. He subsequently took over the firm from 1877, initially under the name Taylor & O'Connor. In around 1900 the firm took on another partner (at the time of Taylor's retirement or death?), operating as Taylor & Clifton, the firm continuing into the early twentieth century (Berners Street?).
(Stained Glass of Wales)