As promised, here is the information on John Wilson:
"Capt John Wilson, 51 Saul Road, Crumlin, who has died, was a former member of C Company 3rd Engineers, I.R.A., and of the Dublin Brigade Active Service Unit.
He was captured during the burning of the Custom House and interned. He was in later years a member of the staff of Bord na Mona.
The funeral took place after Mass in St Bernadette's Church, Clogher Road, Crumlin to Mount Jerome Cemetery.
The chief mourners were Mrs E Wilson (widow); Jack and Jerry (sons); Joan (daughter); Mrs M Quinn and Mrs Smith (sisters); Mrs McKenna (mother-in-law); George McKenna (brother-in-law); Mrs K Murphy (sister-in-law); Messrs J and M Scully (uncles); Miss Scully (aunt); Mrs M Wilson (sister-in-law).
The attendance included Mr J Carroll, T.C.; Col W Stapleton and Mrs Stapleton; Comdt T Donnelly; Comdt V Byrne; Capt W Corri agus Mrs Corri; Capt J Kerrigan; Capt D Hannon and Mrs Hannon; Capt E Breslin, Mr J Murphy and D Morrissey.
A firing party at the graveside consisted of members of the 2nd Batt Eastern Command, under Lieutenant Goggin."
Irish Independent, July 09, 1955. p. 13. Some of those mentioned were definitely at the Custom House - V Byrne, who is mentioned in the film Michael Collins (Vinny Byrne), Stapleton, Donnelly and Ned Breslin were all definitely there.