The Asia was built at Aberdeen in 1819. Convicts were transported to Australia on the Asia in 1820, 1822, 1825, 1828, 1830, 1832, 1833, 1836 (VDL) and 1840 (VDL)
The convicts transportd on the Asia came from districts throughout England. They were held in county prisons or Newgate before being sent to one of the prison hulks. Some of the convicts who were tried at the Old Bailey on 24 October 1821 including Thomas French, Benjamin Abbott, John Sowerby, John Lynn, William Marrs, George Wilson, William Jones and Thomas Wilson, were sent to the Leviathan hulk at Portsmouth on 3rd December 1821; they transferred to the Asia on 26th March 1822. 
Departure from England
The Asia departed England on 4th April 1822, three days prior to the Guildford.
Surgeon James Mercer
Although James Mercer submitted a journal to the Colonial Government on arrival the journal does not seem to have survived. However in the journal of his voyage of the Asia 1 (3) in 1825 he commented that he considered himself fortunate in that there was little illness on either of these voyages. On the voyage in 1825 James Mercer allowed dancing and encouraged the prisoners to be active.
The Guard consisted of Ensign Carmac, one sergeant, one corporal and twenty-nine privates of the 3rd Regiment (Buffs); also four women and six children belonging to the guard.
The Asia arrived in Port Jackson on 24th July 1822 with 189 male prisoners in good health, one having died on the passage out.
The men were landed on Monday 29th July 1822. Two or three prisoners were sent to the General Hospital in Sydney.
His Excellency Governor Brisbane inspected them and they were afterwards handed over to their various employments. Forty-three prisoners were forwarded to Parramatta district by boat; five to Windsor district; eight to Evan district; nine to Airds; thirteen to Liverpool district.
5). Return of Convicts of the Asia assigned between 1st January 1832 and 31st March 1832 (Sydney Gazette 14 June 1832).....
Thomas Campbell Pedlar assigned to Francis Allman at Maitland
John Lynn Butcher assigned to William Stewart in Sydney
6). Lieutenant George Richard Carmac joined the Buffs on 17 November 1814. He was appointed Ensign on 18 March 1819. In NSW he was acting Commandant at Port Macquarie in November and December 1824 after Captain John Rolland died. Lieutenant Carmac was appointed Captain on 14 December 1826 (2). He married Henrietta, second daughter of Major Maling at Calcutta in February 1833. His wife gave birth to a daughter at Ghazeepore in 1835. He died at Meerut in 1838 after a few days fever and illness. 'This Officer who was senior captain in the 3rd regiment had served with it for a period of nineteen years. 
Commandants at Port Macquarie.... Francis Allman 1821 -1824
Captain Rolland succeeded Allman April 1824
Lieutenant Carmac, 1824
Henry Gillman 1824 - 1826
Archibald Clunes Innes 1826-1827
7). William Marrs was tried at the Old Bailey 24 October 1821 - He was admitted to the Leviathan hulk at Portsmouth 3 December 1821 under sentence of transportation for life. He was transferred to the Asia on 26th March 1822. On arrival in the Colony he was sent to the Parramatta district. He was granted a ticket of leave for the district of Sutton Forrest in May 1832 which was altered to Bungonia in 1836. His ticket of leave was cancelled in May 1838 for repeated drunkenness and restored 9th December 1839 district Goulburn. He applied to marry Eliza Ryan (per ship Roslin Castle) in August 1842 which was granted, however no marriage is recorded. When he petitioned for a pardon in 1846 his masters were Francis Rossi and Francis McArthur (both at Goulburn). William Marrs description was included on his Conditional Pardon which was granted 8 September 1847 - Trade: butcher; 5ft 6 1/2 in, ruddy complexion, black hair, dark eyes.
 Bateson, Charles Library of Australian History (1983). The convict ships, 1787-1868 (Australian ed). Library of Australian History, Sydney : pp.344-345, 383
 Home Office: Convict Prison Hulks: Registers and Letter Books; Class: HO9; Piece: 8 Description Year Range: 1801-1836 Source Information Ancestry.com. UK, Prison Hulk Registers and Letter Books, 1802-1849