Sorry, I should have said "barn and stables" but the references don't say where the ancillary buildings were in relation to the main house. These are the relevant quotes from Rachel Roxburgh's "Early Colonial Houses of NSW", Landsdowne Press, 1974
" Norwood House and its barn are reminiscent of the Vineyard, particularly the barn, the house being smaller and simpler than Vineyard House." (pg 460)
Norwood is at Goulburn, built by Francis McArthur - a relative of Hannibal - there is this further mention of the barn at Norwood:
"McArthur, writing to the Land Board in 1835, listed his buildings, including a brick barn, the existing one, 50 feet long and costing some £600." (pg 460)
"The guinea fowl roosted in the trees near the house, the peacock walked about magestically or screamed from the ridge of the stable roof." (quote from Emmeline - Hannibal Macarthur's daughter pg 557)
"When at last the Vineyard was put up for sale, Hannibal and Maria Macarthur went to live at Manar with the Gordons [Hannibal's daughter Mary and her husband Hugh Gordon]. Except for a few portraits, 'valueless except to us', the noble house, with its books and pictures and furniture, its gardens, fruit trees and stables, the woods where the moonlight the children had become familiar with the strange antipodean animals, all were sold - a loss not merely of a collection of objects, but of a rare entity: a home of charm and quality ..." pg 560