there was a thomas crawshaw born around 1819 who was a convict sent to australia - he waas sentenced in Sheffield so it may be the same one - here are the details: CrawshawThomas7y38SheffieldStealing fowls The convict ship was the Clara - arrived in Western Australia in 1857
This 708 ton ship was built in Sunderland in 1853. It was employed twice as a convict transport for Western Australia and left London, England on March 19, 1857 bound for the S 1819 wan River Colony. She carried the eighteenth of 37 shipments of male convicts destined for Western Australia. On this voyage the Clara took 106 days and arrived in Fremantle on July 3, 1857 with 95 passengers and 262 convicts [Erickson]. Henry Peachey and Jas. Caldwell were the captain and surgeon respectively.