Seraya, found it!
Emigrants to Australia on St George from Oban, 4th July 1838, a long journey by carts to Fort William, then by steamboat to Oban. the passengers departed from Kingussie in mid-summer on the day of St Columba's Fair, (Latha Feill Challuim Cille).
Apparently much weeping & wailing at the fair in Kingussie at their departure.
The St George carried 326 passengers, more than a third of these left from Kingussie, two adults & eight children died on the voyage & five births, 3 female & 2 male, which ended at Sydney on 13 November 1838. Most of the Kingussie contingent were tenants on the Invereshie estate of Sir John MacPherson Grant of Ballindalloch who had raised the rents to such a level as made emigration the only practical option, (rack-renting). As far as I can make out the only other Rothiemurchus tenant was an Alexander Taylor 27, farm servant, can read Gaelic, father James Taylor gardeners laboured, mother Anne, engaged by Mr Hoshing, Sydney £25 a year, with rations. The Rothiemurchus laird was Grant of Rothiemurchus. For an insight into how things stood on that estate & the lives of the people, see "Memoirs of a Highland Lady" by Elizabeth Grant of Rothiemurchus, which were written in the 1840/50s.
Hope this is of some use,
Bests,
Skoosh.
1838, John Grant, 24 farmer, can read & write, Rothiemurchus, father Peter Grant, farmer, Rothiemurchus, mother Mary Grant. Engaged by Mr Hoshing, Sydney, waged £12.10/- with rations, term, 6 months.