From 1865 to 1869 he practised in partnership with Thomas Keane. In 1869, he became the Registrar of the Supreme Court of Queensland, but resigned this position upon the death of Thomas Keane to take over the law practice. Fowles would practise as a solicitor in Clermont, Queensland from 1873. He also took a part interest in the Peak Downs Telegram and was editor of it. After standing as a Liberal candidate and winning the seat of Clermont in 1878, changes occurred within the party and before he could take his seat in the chamber, he again took the position of the Registrar of the Supreme Court of Queensland in 1879. He would hold this position until his death in 1880.