The Marquis of Huntley was built at Aberdeen in 1804. She transported convicts to New South Wales in 1826, 1828, 1830 and 1835. 
The Marquis of Huntley departed Cork with one hundred and sixty Irish convicts on 27th September 1827.
The Military Guard consisted of 33 rank and file, 3 women and 8 children under orders of Lieut. Slade (age 23) of the 40th Regiment of Infantry. They had received orders to prepare for embarkation on 20th August 1827.
Surgeon John Smith
John Smith kept a Medical Journal from 20th August 1827 to 11 February 1828.
He first treated Lieut. Slade while the ship lay in the Cove of Cork. According to the surgeon, Slade had been in India and suffered from fever and dysentery and was debilitated by climate and manner of living. The surgeon treated him with brandy and water and Slade had recovered by the following day.
Some of the other soldiers of the guard who were treated by the surgeon included Richard Rawlins; R. Howes; H. Mead; John Macsim; Edward Hayes (punished); Peter Morse; Corporal Faulton; George Walker; James Pearse; James Wood; John Baldwin;; William Baker; Corporal O'Connell; John Prison; John Iverson; Patrick McKnight; Patrick Brudnell; James Webster; John Baldwin and Timothy Conway. 
Passengers on this voyage included military surgeon Donald McLeod, Alfred Glennie (brother of James Glennie, Henry Glennie and Benjamin Glennie) and four other Charter passengers. There were also four sons of prisoners who received a free passage.
Cape of Good Hope
After departing Cork on 27th September 1827, the Marquis of Huntley arrived in Simon's Bay on 14 December where two or three more convicts were embarked. One was a fisherman who was convicted of stabbing a prisoner.
Bushranger Martin Cash arrived as a convict on the Marquis of Huntley. In his Memoirs he remarked on the voyage..... 'We had a very favourable passage, nothing remarkable having occurred. I was a great favourite with the sailors who I often accompanied aloft, and before reaching Sydney I could take a turn at furling the sails, or in fact any other duty which the sailors had to perform. I often since had occasion to remember a casual observation made by the first mate of the vessel, to the effect that if he did not much mistake, my career would be remarked by some extraordinary circumstances.
Arrival in Port Jackson
The Marquis of Huntley arrived in Port Jackson on 30 January 1828. On arrival a muster of 163 prisoners was held on board the ship by Colonial Secretary Alexander McLeay. Details of each convict were recorded - name, age, education, religion, marital status, family, native place, trade, offence, when and where tried, sentence, prior convicts, physical description and to whom assigned on arrival.
On arrival we were drafted to Hyde Park barracks, it being the general depot at that time for receiving prisoners. The assignment, or hiring out system, had then come into operation, and myself together with eighteen or nineteen of my companions in misery were forwarded to different masters at Richmond N.S.W., which at that time was but a very thinly populated village with only a humble hut scattered here and there. I was assigned to Mr. George Bowman whom I learned was a bit of a martinet' .
2. John Smith was also surgeon on the convict ships Surry in 1834, Moffatt in 1836 and the Clyde in 1838.
3. Waterford Assizes, Monday March 19..........
Matthew Power, breaking into the back premises of Doctor Briscoe's house, and stealing therefrom some towels a garden spade, and some live fowl. The prisoner was traced to his lodgings by means of some straw he carried with him, where the Doctor found him employed in plucking the fowl he had carried off. Being an old offender he was sentenced to seven years' transportation....
John Walsh, Darby Lynch, Catherine Connor, and Margaret Harrington were indicted for robbing Thomas Morris of his watch and 5 10s in cash. Morris it appeared, lived in Taghon, in the County of Wexford but had occasion to visit Waterford some time ago; and being a lover equally of the bottle and the fair sex, he had the gratification of indulging his usual propensities in the company of the two female prisoners on his last visit; and after carousing with them until all recollection and reason was gone, he, to his very great surprise, awoke the next morning stretched on a pavement bed in High Street minus his watch 5 10s in money, his shoes, and a favourite tobacco knife. The prisoners were traced to their rendezvous at a house in the Mayors walk, and taken into custody, and the knife and hoses found on two of the party. The watch was stopped at a public house where it had been just deposited by Lynch for a noggin of whiskey; and despite an alibi set up in defence, and divers ingenious efforts to throw the guilt on each other's shoulders, the whole group were found guilty, and sentenced each to seven years transportation. Finn's Leinster Journal 24 March 1827.
5. Donald McLeod, military surgeon - Australian Medical Pioneer Index
6. Return of Convicts of the Marquis of Huntley assigned between 1st January 1832 and 31st March 1832 (Sydney Gazette 14 June 1832).....
Thomas Crozier - Blacksmith assigned to John Hawdon at Cowpastures
John Gorman - Farm servant assigned to David Johnston at Cook's River
Martin Gallaran (Gallavan) - Farm servant assigned to Henry Gunsley Watson at Brisbane Water
8. Rev. Alfred Glennie Journals 1855-60 - Historical Records of the Central Coast of New South Wales: Rev Alfred Glennie Journals 1855-60, by the Gosford District Local History Study Group. Published 1987 by Gosford District Local History Study Group, Narara.
Alfred Glennie was the Rector of Gosford in the years 1850-1865 and this book is a collection of his transcribed diaries, which helps to shed light on what the area was like and who was residing in Gosford at this particular point in history
9. Vessels bringing detachments of the 40th regiment and Officers in Command:
Albion 1823 - Lieutenant Lowe
Asia 1823 - Captain Bishop
Isabella 1823 - Lieutenant Millar
Guildford 1823 - Captain Thornhill
Medina 1823 - Lieutenant Ganning
Castle Forbes 1823 - Lt.- Col. Balfour
Prince Regent 1823 - Captain Stewart
Chapman 1824 - Captain Jebb
Countess of Harcourt 1824 - Captain Morow
Mangles 1824 - Lt.- Col Thornton
Princess Charlotte 1824 - Lieut Neilley
Ann and Amelia 1825 - Captain Richard Turton
Midas 1827 (two ensigns)
John 1827 - Lieut. James Stopford
Florentia 1828 - Captain Barnett
Marquis of Huntley 1828 - Lieut. Slade
Eliza II 1829 - Lieut. Sweeney
Layton 1829 - Lieut. Miller
City of Edinburgh 1832 (one sergeant)
Lady Kennaway 1835 (one ensign)
 Ancestry.com. UK, Royal Navy Medical Journals, 1817-1857. Medical Journal of John Smith on the voyage of the Marquis of Huntley in 1828. The National Archives. Kew, Richmond, Surrey.
 Bateson, Charles, Library of Australian History (1983). The convict ships, 1787-1868 (Australian ed). Library of Australian History, Sydney : pp.346-347, 385
 An Excerpt from 'Martin Cash, The Bushranger of Van Diemen's Land in 1843-44: A Personal Narrative of his Exploits in the bush and his experiences at Port Arthur and Norfolk Island., 32,000 with illustrations, 7th edition, Hobart: J. Walch and Sons, 1961.