Yes, the William ALLEN, alias Thomas ELDRIDGE, was tried at London Gaol Delivery, arrived per Surrey in 1814 and because of a colonial conviction was issued with a Ticket of Leave number 49/0077 by the Bench at Windsor.
Reel 961 at the NSW Archives will include the original butts.
He may have been a witness at the Newcastle NSW marriage of Robert YOUNG and Martha WILLIAMS 6 August 1818.
He was (as William ALLEN, per the Surrey) recorded in the NSW 1828 Census at Port Macquarie, serving a life sentence.
There is a burial registered at St Matthews Church of England, Windsor by the Rev Henry T Stiles, for a William ALLEN, aged 55, died 14 August 1851, Windsor Hospital, buried 15 August 1851.
The Convict Indents for July 1814:William ALLEN alias Thomas ELDRIDGE, aged 21 years, born London, a Groom. 5 ft 5 inches tall, fair complexion, Dark Brown hair, Hazel eyes. Trial London Gaol Delivery 17 Feb 1813, sentenced to Life. Transported per Surrey arriving 28 July 1814.
Colonial Sentence:2 August Sydney Criminal Court, sentence to Life, transported to Newcastle NSW
Ticket of Leave issued 1849, 49/77
Original Remarks noted "Transported for Life to Newcastle 2 August 1817 by the criminal Court Sydney, again 25 January 1819 for the remainder of the original sentence by the Sydney Bench for street robbery" NSW Archives, perhaps reel 940.
JM