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No Irish player, not even Willie John McBride, had ever lasted long enough or been good enough to record that many victories.
When Gibson made his final bow, at Murrayfield on the first Saturday in March 1979, the cognoscenti nodded in sage agreement.
Nobody would see his like again and as for anyone equalling his record of recurring success against England, well that was stretching the elastic of credibility beyond breaking point.
Brian O'Driscoll would not have known much about any of that at the time - he was all of six weeks old.
Should Ireland beat England at Twickenham on Saturday, the supreme European back post-professionalism will have gone one better than the supreme European back of the old amateur era.
Round Three of the RBS 6 Nations offers a myriad of possibilities, not least that by Saturday night four of the six - France, England, Ireland, Wales - will have won two out of three.
Should the French put an end to their worst losing sequence of away matches by winning in Cardiff on Friday night, they will sit back and see whether Ireland can keep with them on course for le Grand Chelem.
Scotland's trip to Rome raises the question of whether they can avoid losing in the Eternal City for the fourth time in a row.
Italy, home at last after winning new friends for the way they played on the road, especially in Cardiff, will expect to build on their tally of three tries against opponents with none to show for their last four matches.
Most intriguingly, the weekend will centre around the sole surviving member of the original Six Nations cast on the day he plays Test match No.139, equalling George Gregan's world record. O'Driscoll and Gibson run like parallels of gold through half a century of Anglo-Irish rugby history.
At 35 one year younger than Gibson when the multi-dimensional Ulsterman decided he had done enough, the celebrated Dubliner makes one final pilgrimage to 'HQ' having already helped his country to eight wins over England in 12 attempts.
It can be said without fear of contradiction that a two-thirds success rate would not have been what O'Driscoll had in mind after his first exposure to the English charioteers on their home track in the first round of the first Six Nations.
Lining up behind his own posts for not one conversion but six made for a demoralising experience.
A newcomer on the England left wing, Ben Cohen, marked his advent with two tries. The other wing, Austin Healey, accounted for two more, Neil Back got one as did the second new cap, Mike Tindall.
Eight goals from Jonny took England to 50, all in marked contrast to Gibson's first appearance at Twickenham in 1964.
To say he took the game by the scruff of the neck and turned it inside out would hardly do him justice.
Then a 21-year-old law student at Cambridge University, Gibson's electrifying intuition turned a 5-3 half-time deficit into a thumping away win, his majestic performance achieving more than creating four tries finished off by Kevin Flynn (2), Pat Casey and Noel Murphy.
Nobody was more impressed than McBride: "We won 18-5, much of it due to a young outside half who was making his international debut. His name was CMH Gibson and he was to become one of the greatest backs seen not only in Ireland but anywhere in the British Isles or, indeed, the world."
Gibson faced England 15 times, the first five at fly half, the next eight in the centre before reverting to No.10 for one last match and finishing up on the right wing. Half of his eight wins came at Twickenham, including three in a row during the Seventies.
Apart from the fact that Ireland scored the same number of points on each occasion, O'Driscoll's Twickenham initiation under Keith Wood's captaincy could hardly have provided a more stark contrast to Gibson's under Tom Kiernan.
When the countries met in 2001, in a fixture postponed from spring to autumn because of the foot-and-mouth epidemic, Ireland had recovered sufficiently to take immediate steps towards evening up the score.
For the third Championship in a row, England went into their last match within sight of a Grand Slam only for the prize to vanish like a mirage, as it had done at Murrayfield the previous season and at Wembley against Wales the season before that.
Wood's early try from a line-out and five penalties, three from David Humphreys followed by two from his replacement, Ronan O'Gara, had a shattering effect.
England's head coach, plain Clive Woodward as he was back then, admitted he had got selection 'badly wrong,' acknowledged that Ireland had shown 'more desire' and blamed the exhausting after-effects of the Lions tour to Australia that summer.
Ireland's best players had been on the same tour, admittedly far fewer than the 20-strong English contingent.
Woodward eventually presided over the long-lost Grand Slam, clinching it at Lansdowne Road in a manner which effectively served notice on the rest of the world that nobody would stop Martin Johnson's England seizing the Webb Ellis pot of gold in Sydney eight months later.
Once home, nobody in the Six Nations would beat them more regularly than O'Driscoll's Ireland. As World Cup holders, England made light of Johnson's retirement, sweeping to runaway wins in Rome and Edinburgh on a flood of 12 tries before returning home where they found Ireland waiting.
England, unbeaten at Twickenham since the All Blacks won there during the 1999 World Cup, were such hot favourites that at least one bookmaker gave the visitors a 25-point start.
Not for nothing did O'Driscoll volunteer the thought pre-match that the Irish might just give the prawn-sandwich brigade 'something to choke on'.
He must have known something. The English line-out went to pieces, Paul O'Connell and Malcolm O'Kelly had a field day, Girvan Dempsey scored in the corner and O'Gara supplied the usual barrage off the tee. O'Driscoll followed that win (19-13) with six more on the trot from 2005 to 2011.
The one match England won during that period, at Twickenham in 2008, when Danny Cipriani ran the show on his first start, happened to be the one match O'Driscoll missed during those years.
The sequence included England's 30-point capitulation at Croke Park seven years ago, a beating which Jonny Wilkinson recalled the other day in support of his view that Ireland's belief and passion under O'Connell makes them 'incredibly dangerous'.
'I felt the full wrath of that at Croke Park,' he said. 'England will need to get as close as possible to matching the passion and ferocity of the Irish game.'
O'Driscoll's record against England:
Played 12, Won 8, Drawn 0, Lost 4.
Twickenham Test debut:
February 5, 2000:
Result: England 50, Ireland 18.
England: M Perry (Bath); A Healey (Leicester), M Tindall (Bath), M Catt (Bath), B Cohen (Northampton); J Wilkinson (Newcastle), M Dawson (Northampton, capt); J Leonard (Harlequins), P Greening (Gloucester), P Vickery (Gloucester); G Archer (Newcastle), S Shaw (Wasps); R Hill (Saracens), N Back (Leicester), L Dallaglio (Wasps).
Substitutes: I Balshaw (Bath) for Perry; M Corry (Leicester) for Shaw; T Woodman (Gloucester) for Leonard.
Ireland: C O'Shea (London Irish); J Bishop (London Irish), B O'Driscoll (Blackrock College), M Mullins (Young Munster), K Maggs (Bath); D Humphreys (Dungannon), T Tierney (Garryowen); P Clohessy (Young Munster), K Wood, capt (Garryowen), P Wallace (Saracens); B Casey (Blackrock College), M O'Kelly (St Mary's College); D O'Cuinneagain (Ballymena), K Dawson (London Irish), A Foley (Shannon).
Substitutes: M Galwey (Shannon) for Casey; T Brennan (St Mary's College) for O'Cuinneagain; G Dempsey (Ternure College) for O'Shea.
Gibson's record against England:
Played 15, Won 8, Drawn 2, Lost 5.
Twickenham Test debut:
February 8, 1964.
Result: England 5, Ireland 18.
England: J Willcox, capt (Harlequins); A Underwood (Exeter), M Phillips (Fylde), M Weston (Durham City), J Ranson (Rosslyn Park); T Brophy (Liverpool), S Clarke (Cambridge University); R Jacobs (Northampton), H Godwin (Coventry), N Drake-Lee (Cambridge University); A Davis (Torquay), C Payne (Harlequins); B Rogers (Bedford), P Ford (Gloucester), D Perry (Bedford).
Ireland: T Kiernan (Cork Constitution); P Casey (UC Dublin), J Walsh (UC Cork), M Flynn (Wanderers), J Fortune (Clontarf); M Gibson (Cambridge University), J Kelly (UC Dublin); P O'Callaghan (London Irish), R Dawson (Wanderers), R McLoughlin (Gosforth); W J McBride (Ballymena), W Mulcahy, capt (Bective Rangers); E McGuire (UC Galway), N Murphy (Cork Constitution), M Culliton (Wanderers).