In March 1854, he was able to marry Mary Bennett (1824–1914), a convict from County Clare. He was let out of prison and went back to Tasmania. He worked in the gardens in the government Domain, Hobart. In May 1856, he went to New Zealand, but came back to Tasmania four years later. He bought a hop farm at Glenorchy. Cash told the story of his life to James Lester Burke, an Irish ex-convict. Burke wrote down the story which was published in Hobart in 1870. It has been reprinted many times. Martin Cash died on August 27, 1877.