Everyone knew it would take more for Shields to feel at home in an England shirt than passing reference to the "teaspoons on the wall and chip butties on a Sunday afternoon", at his grandparents' houses in Essex and Yorkshire that he claimed as evidence of his bona-fide heritage.
The Hurricanes captain needed to flex some muscle, shed some blood for the cause for him to believe that he truly belonged and for his new teammates to trust him instinctively. A passport will give you name, rank and number: a full-bore, sweat-flecked, no-holds-barred contribution on the pitch brooked no doubt about a man's commitment.
Shields' parents, Nigel and Danielle, had flown from London to see their son belt out the anthem and go on to do his stuff that he previously had only played out against a New Zealand backdrop. They themselves had returned to their England roots: now their boy was following suit. The only way, though, in which Shields was going to quell the disquiet around his Usain Bolt-type fast-tracking into England colours was to make a statement on his first start.
Shields has perfect claim on qualifying to play, yet the unease is legitimate. Jones made a point of accommodating him as much for his leadership as for his playing skills. The 27-year-old is a hard-nosed blindside forward, yet no more or no less than a Chris Robshaw in form. On this showing, he is no game-shaper or breaker. The Springbok back row, with Duane Vermeulen on the clatter and Siya Kolisi riding shotgun to great effect, looked different class, the Springbok captain driving Shields back five metres at one point.
At a time when the Rugby Football Union is under duress, with 40 redundancies imminent in the rugby department, there was urgent need for connection to all that England represented. Some who had worked hard to develop players would have their reservations about Shields' arrival in their midst. This performance will have done little to lower those raised eyebrows.