Hi there,
If you're related to Agusta Hewitt, then we are distant relatives. My grandad was William Brooke Hewitt, who was the son of James Hewitt (Agusta Hewitt's brother). I don't have much more information that you already have. Agusta and James had a brother who died when he was 2, that's pretty much all I know.
If you find anything more, please let me know!
Moderator comment Images of RootsIreland data replaced with transcriptions of records
James Hewitt age 2 son of William Hewitt of Muladry buried 16 Feb 1882 in Armagh - religion SOciety of Friends
William Hewitt, farmer of St Saviours Mulladrey m Elleanor Boyd of Termoyra 14 Mar 1879 parish of Shankill, Armargh
Fathers James Hewitt and Thomas Boyd, both farmers
James William Hewitt bachelor age 28 of 100 Thomas St Portadown, Armagh m Martha Sarah Church age 27 spinster of Ballyworkan Portadown 6 Sep 1910, Methodist Church Portadown