Lots more online since this thread was started in 2006

This should help with the original query-
Belfast News-Letter, 12 May 1947: MR. ROBERT BARR Mr. Robert Barr, secretary of Belfast Celtic Football Club, died suddenly yesterday morning at his residence, St. James’s Park, Belfast. ... had not been good health for some time, but was present ... the inter-city match between Celtic and ...
GRONI's index shows- D/1947/55/1007/91/169 Robert Barr, age 72, death 11 May 1947 Belfast
Irish Times, 12 May 1947: … morning of Mr. Robert Barr who had been secretary Belfast Celtic A.F.C. since 1893 ... one the best-known figures to Irish football. Mr. Barr's health had been indifferent for some time but attended the Inter-City Cup game between Celtic and Bohemians at ...
Belfast Telegraph, 12 May 1947: ... championship, and had many other successes to his credit as a road racer. Mr. Barr is survived by his wife and four sons- Mr Robert Barr, L.D.S.: Dr. Arthur Barr, Coventry: Mr. Edward Barr, L.D.S., Uxbridge. and Mr. Winston Barr. There are also three brothers- Mr. John Barr, principal of St. Anthony's P.E.S., Willowfield, and Mr. Joseph and Mr. Patrick ...
13 May 1947: The funeral of Mr. Robert Barr, secretary of Belfast Celtic F.C., which took place to-day from St John's R.C. Church, Falls Road. to Milltown Cemetery, was followed ...