I wonder who the Ninion Stewart born 1740 was. I haven't come across any Ninians as late as that.
I have some of those Dawsons, but they're mostly not joined up on my tree just yet. The only thing I can add is that Charles Stewart of Ballintoy and Joshua Dawson had a mutual friend in "French" John O'Neill:
From O'Laverty's Down and Connor (1884):
[vol III, p306, from "French" John O'Neill's memorandum]
" Sir Neal O'Neill was wounded at the battle of the Boyne, in 1690. near Slane, was carried to Dublin, and from thence to Waterford, where he died of his wounds, by the negligence of his surgeons.
" Alexander M'Donnel, Earl of Antrim, brother to the Marquis, died at Thistleworth, near London, in the year 1699, and was buried at Holywell, in Wales.
" My old comrade, Major Charles Stewart, of Ballintoy, died in London, about the midst of November, 1710, and was buried in St. James's Church.
"Captain Edmund Stafford (3) died in Portglenone, in August, 1713, and was buried in the Church of Ahoghill, by whose death I lost a kind, dear friend.
" Clotworthy Skeffington, Lord Viscount Massereene (the first of that Christian name), died in the Castle of Antrim, the 13th of March, 1713-14, and was buried in the Church of Antrim.
"Captain William Shaw, my old comrade, died at Bush, on the 3rd of November, 1719, and was buried at Templepatrick.
" Randle M'Donnel, Earl of Antrim (son of Earl Alexander), died in Dublin, in October, 1721, and was buried in Christ's Church there.
"Joshua Dawson, Esq., died the 12th of March, 1725, at Castledawson, and was buried in his own chapel there, by which I lost a very kind, dear friend.
" Colonel Clotworthy Upton, died at Castle Upton, the 8th of ___ 1725, and was buried in Templepatrick, by which I lost a good friend.
" My old friend, Mr. James M'Cullough, died at Grogan, the 19th of July, 1725, and was buried in Old Drumall.
" My old schoolfellow and comrade, Henry M'Culloch, Esq., died the 16th January, 1728-9, and was buried in Old Drumall.
"Charles Campbell, Esq., died at New Grange, the 29th of October, 1725, by which I lost a very good friend.
I haven't worked out if Charles Stewart was buried at St. James Dublin or St. James London. I think possibly the latter - it is also where Archibald Hutchinson was buried. I tried contacting the church a few weeks ago, but haven't heard anything back.