Thomas Beavan was a partner in Speir & Beavan, Architects in Wharton Street in Cardiff.
In 1906-07 the partnership built Cathays Library, a free public library endowed by Andrew Carnegie
Thomas died on 6th january 1920 and living at the time in 2 Newport Road. Dying at the tender age of 39 he was buried on 9th January 1920 in plot S486b. A non-conformist the ceremony overseen by minister Rev J Macara Gardner of Roath Park Presbyterian Church (later St Andrews URC "The Scottish Church", Cardiff) 1918-1922.