The end of a beautiful relationship as Paddy McNair departure signals end of 80-year unbroken Irish presence at Manchester United
Absence of Irish at Old Trafford after unbroken 80 years raises question over youth coaching
On the same day Paul McGrath left Manchester United back in August 1989, Cork midfielder Brian Carey officially signed for the club. It reflected what was then almost a revolving door for Irish players at Old Trafford. Be they stars, squad stalwarts or young upstarts, there was a constant stream from this island.
Last week, however, that door temporarily stayed shut - and for the first time in a long time.
It also meant Paddy McNair's transfer to Sunderland took on an historic significance for United and Ireland way beyond the sale of a young fringe defender.
McNair's departure means that the club's first-team squad doesn't feature a player from this island for the first time since 1936.
That is a remarkable 80-year lineage, and one that speaks to the club's renowned connection with Ireland, north and south, as well as saying a lot about where both Irish football and United are right now.
The northern English city's long history of Irish immigration made an intrinsic link inevitable.
The team came close to playing as 'Manchester Celtic' when it was decided to rename the financially stricken Newton Heath in 1902, but it was really the range and reputation of the players that strengthened that link.
It is not just that United have featured 32 Northern Ireland internationals and 34 from the Republic.
It is also that they've featured more genuine legends than pretty much any other club, too. An all-time Ireland XI would be dominated by those who graced Old Trafford.
The player who began that line on joining the club in 1936 aptly set the standard.
The great Johnny Carey became Matt Busby's first captain and was their first star to make headlines - and thereby United fans - back in Dublin.
Liam Whelan immediately followed as one of the Busby Babes, before tragically becoming the only non-English player to die in the Munich air disaster, imbuing the club's Irish connection with a more profound emotional element.
It was a connection perpetuated by monolithic figures like George Best, Harry Gregg, Norman Whiteside, Sammy McIlroy, Kevin Moran, Frank Stapleton, Paul McGrath, Denis Irwin and Roy Keane.
The primary problem in all of this is that Ireland as a whole is no longer producing players even close to that level, while United have moved on to a drastically different level as a global superclub; they are now looking almost everywhere for players with almost everything.
It's just a completely different circumstance, but even Brian Carey's story about how he first went to Old Trafford - and one so common to so many Irish players - now feels like it was from a completely different world than even 28 years ago, right down to the fact that United were going for a Cork City player.
"Fergie just rang me up one morning in 1989, saying: 'Look we want to sign you, we want you to come across, everything is organised, will you do it?'," Carey explains.
"At the time, he wasn't the man he would become . . . and I actually said no. Can you imagine it? I was doing construction economics at CIT at the time, and he said 'right, you get your exams, we'll pick it up again in July'. This is 8.00 in the morning, and I'm in the middle of the stairs thinking 'God almighty, what's going on?' before going back to bed.
"Anyway, I couldn't believe I said no but I did the exam and, true to his word, he did come back.
Fergie remarked after I'd signed that he liked that I had a nose that looked like it had been broken a couple of times," Carey added.
United look for a much greater range of qualities now.
United's operation here is like many other elements of the club, in that it still hasn't been re-assessed and revamped after the retirement of Ferguson.
He put in place a network that was based on interpersonal relationships with people he trusted, rather than a system more suited to a modern superclub.
Although United are still very busy in Northern Ireland and have an academy in the Dundalk area to complement their scouts, they don't have a gifted figurehead like the late Bob Bishop who famously provided a production line to Old Trafford from Best to Whiteside.
That means they just aren't as slick or as attentive as rivals like Chelsea and Manchester City, and are getting much more competition in Ireland than they're used to.
As one source put it: "The Fergie factor covered a multitude of faults in this area for years, and it does seem neglected now."
The latter, at least, is beginning to change.
United are undertaking a complete reform of their global scouting network, and that will likely bring their set-up in Ireland up to the expected level.
Top-level players are being produced by accident rather than design.
The door isn't completely closed.
It's just that, given how much the United link has signified for Irish football, this should signal a deep re-assessment of its current state.
This should really be a case of red alert.