Complex sentence: Cashmore was born in England, and emigrated to New South Wales in 1836, working initially for Samuel Emanuel (Emmanuel?) in George Street, Sydney near The Rocks, then went into business on his own account in the same street.
Split into simpler sentences: Cashmore was born in England, and emigrated to New South Wales in 1836, working initially for? Emanuel in George Street, Sydney near The Rocks, then went into business on his own account in the same street.