I was researching my family a number of years back and found the following details on a post about the Rohan family unfortunately, as does happen, I put it all away and did not follow up with the poster, so I don't know who posted the information.

I am the gg granddaughter of Francis McGrath who travelled to Australia on the John Linn in Sept. 1857.

This is the content of the post which I copied at the time.

McGRATH
On October 23, at the residence of her son-in-law, Mr J. Trapski, Wyndham, Mary Ann, beloved wife of Francis McGrath, late of Dunedin, aged 68 years. R.I.P.

* MARY ANN McGrath (nee FARRELL) married 19 May 1859 at St Francis Roman Catholic Church, Melbourne to Francis 'Frank' McGrath (1830-1910). Francis was from King County, Ireland, a son of Dennis & Bridget McGrath. He appears to have arrived in Victoria in Sep 1857 on the 'John Linn' with his brother John McGrath (1836-)
Francis & Mary Ann arrived in Port Chalmers, Dunedin 30 March 1862 on the 'Mary E. Ray' with an infant named Francis McGrath. They were Hotel Keepers, running the 'Harp of Erin' in Great King Street, Dunedin for 20 years.
In May 1880 Francis McGrath was the Proprietor of the North-East Valley Hotel (near Dunedin). The above new and commodious Hotel is situate in one of the most charming and healthy suburbs of Dunedin. The tramways start for, and return from, the centre of the city every few minutes. The hotel is handsomely furnished, and all the apartments, especially the bedrooms, have thorough ventilation. Persons desirous of a comfortable home free from the noise and bustle of the city will do well to enquire for the above hotel
NOTE OF INTEREST in 1874 a crewman on board the 'Scimtar', John Brennan, alias Cloach, got a job as a cook in the 'Harp of Erin' and willfully attempted to murder 15 year old Mary Hall in the kitchen there in June 1874. The Hall's had emigrated on the Scimtar as did Henry & Sarah Berry (see Lindsay above)

the known New Zealand born children of MARY ANN & FRANCIS:
* 1866 - John Thomas McGrath
* 1871 - Bridget McGrath
* 1872 - 1944 Delia McGrath
* 1874 - Dennis McGrath
* 1877 - Martin McGrath
* 1880 - Thomas William McGrath
(because of the large gaps in early births I believe there were a number of other children. Example, Mary Ann died at her son-in-laws home. This was Delia McGrath (1872-1944) who married John Trapski in 1896 but is not on BDM)

MARY ANN & FRANCIS McGrath are buried:
Plot 2, Block 15R at Southern cemetery, Dunedin

~~~~~~

Regards,
Carolyn McGrath
Hobart Tasmania.