Career
He lived in Queensland, New South Wales and Victoria. He founded the Australian Christian World in 1886 and edited it until 1891. In 1894 he edited the Australian Field, a weekly agricultural paper.
Hennessey retired from journalism when about seventy years old, however he continued his literary work until shortly before his death, which occurred after a brief illness.
He was buried at the Dromana Cemetery. As well as short stories in magazines in Australia and England, Hennessey published several novels.