Embarked: 144 men
Voyage: 111 days
Surgeon's Journal: yes
Previous vessel: Minstrel arrived 22 August 1825
Next vessel: Henry Porcher arrived 3 December 1825
Master William Henry Driscoll.
Surgeon Alick Osborne Follow the Irish Convict Ship Trail
The Lonach was built in Littlehampton in 1807. This was the only voyage of the Lonach transporting convicts to Australia.
The Lonach departed Cork on 16 May 1825.
The Guard consisted of Lieutenant Donelan of 57th regiment with a detachment of the same corps.
Alick Osborne kept a Medical Journal from 23 March to 9th September 1825.....
We sailed from Cork on the 16th May 1825 and met with strong southerly winds for eight days. Most of the convicts were country people, many of them had never seen the sea before, and consequently they suffered exceedingly from sea sickness. As soon as they got over the sea sickness, obstinate constipation and a terrific host of bowel complaints made their appearance and harassed us the whole of the voyage. Dysentery, diarrhoea, colic, constipation daily presented themselves and in some instances were extremely severe and troublesome. This class of Irish prisoners appear to be very liable to dyspepsia, and irregularity of action in the alimentary canal; and the total change in their diet combined with the effects of the depressing passions strengthens the predisposition and excites their diseases in the worst form.
After passing the Cape, late in July the weather became cold and stormy. We then issued a pair of flannel drawers to each man and a gill of wine daily, the regular allowance of lime juice and sugar of course as usual; and giving them as much exercise in the open air as weather and circumstances would permit. About a week previous to our arrival at New South Wales, I discovered symptoms of scurvy in five young men of scrofulous habit and weak constitution.
Convicts and soldiers mentioned in the Surgeon's journal included:
James Murphy, convict, aged 26;
John Connor, private 57th regiment, aged 27;
Patrick Naughton, convict, aged 22; disease or hurt, he is of slender form and delicate constitution much oppressed with grief and despondency Taken ill, 23 June 1825 at sea. Died 3 July 1825.
John Donovan, convict, aged 27. 
One hundred and forty-three male prisoners arrived in Port Jackson on 4 September 1825.
A Muster was held on board by Colonial Secretary Frederick Goulburn on 6th and 7th September 1825. The indents include information such as name, when and where tried, sentence, native place, trade and physical description.
Departure from Port Jackson
The Lonach departed Port Jackson on 7th October 1825. Some of the voyage was noted in The India Directory written by By James Horsburgh........Captain Driscoll, of the Lonach, from Port Jackson, bound to Bombay, November 24th, 1825, passed close to the northernmost of the Borneo Coral Isles, and sent a boat to that called by Captain Ross Horsburgh Island, which Captain Driscoll made in lat. 12° 3' S., by noon observation taken two hours previously, and he made it in lon. 97°24' E. by observations of sun and moon, which agrees with the position assigned to these islands in the first volume of this work. The Lonach's boat landed on a fine sandy beach, covered with crabs and aquatic birds, and a path was perceived where the branches were parted and the leaves trodden down, leading into the jungle; several snakes were seen also ; and a large mast, with a bowsprit and teak carline, the remains of a wreck.
3). Return of Convicts of the Lonach assigned between 1st January 1832 and 31st March 1832 (Sydney Gazette 14 June 1832; 21 June 1832).....
Walter Darcey - Harness maker assigned to James Mudie at Castle Forbes
4). Vessels bringing detachments of the 57th Regiment........
Asia 1825 departed Cork 29 October 1824 Captain Richard Heaviside
Asia (III) 1825 departed Portsmouth 5 January 1825 - Lieutenant Thomas Bainbridge
Asia 1828 departed London 23 November 1828 - Lieutenant George Edwards
 Bateson, Charles, Library of Australian History (1983). The convict ships, 1787-1868 (Australian ed). Library of Australian History, Sydney : pp.346-347
 Ancestry.com. UK, Royal Navy Medical Journals, 1817-1857. Original data: Admiralty and predecessors: Office of the Director General of the Medical Department of the Navy and predecessors: The National Archives. Kew, Richmond, Surrey.
 National Archives - Reference: ADM 101/43/4 Description: Medical journal of the Lonach, convict ship from 23 March to 9 September 1825 by Alick Osborne, surgeon and superintendent, during which time the said ship was employed in conveying convicts from Cork to New South Wales.