Manns was born at
Campbelltown,
New South Wales on 20 June 1839. His father, William Manns, was a
convict transported from England, and mother, Mary Turner, was an Irish free settler, who arrived in the colony three years earlier. Growing up in Campbelltown, Manns left home at the age of 19 to work as a
stockman. He later moved to
Forbes and fell in with a gang of
bushrangers led by
Frank Gardiner,
Ben Hall and
John Gilbert. Accounts suggest that Manns was invited into the gang by Gilbert. On 15 June 1862, Manns took part in the hold-up of the gold coach at
Eugowra. They stole 2,719 ounces of gold valued at over £14,000, along with £3,700 in banknotes, shooting two police guards in the process. Following the robbery, Manns and Gilbert attempted to flee to
Victoria but were intercepted by a police party led by Sir
Frederick Pottinger. Gilbert managed to escape while Manns was apprehended. Later, disguised with their faces blackened, Gilbert, Hall and several other gang members attacked the police party and rescued Manns. He was recaptured in December 1862 and, alongside Gardiner–Hall gang members Alexander Fordyce, John Bow and John Macguire, went on trial for his role in the Eugowra robbery. Despite his relatively minor role and this being his first offense, Manns was sentenced to death. Public petitions, including one with over 14,000 signatures, failed to secure his reprieve. ==Botched execution==