An injury to NEC Harlequins flank forward Pat Sanderson took a bit of gloss off a reasonably solid performance as Quins racked up a record European score against the part-timers of Caerphilly, to coast home 73-20 in their first round first leg Parker Pen Challenge Cup tie at Virginia Park.
Sanderson's injury came shortly after the home side had narrowed the gap to only eight points at 13-21, after winger Geraint Lewis had outpaced Viliame Satala down the Caerphilly right flank, and his momentum took him through Matt Moore's attempted block tackle close to the visitors line, as Quins for once found themselves stretched across the park.
Moments earlier Sanderson had almost increased the visitors lead with a third successive try in as many matches when he was adjudged to have knocked-on within sight of the line. Following a lightning break out from defence that had gone through seven pairs of hands, Sanderson attempted to dribble his way over from 15 metres out, and was adjudged to have knocked-on close to the line before touching down.
Quins would have gone 28-6 in front at that stage if the try had counted, but they were not to be denied, and with Sanderson lying down injured, lock Jim Evans accepted a slick pass from skipper for the day Tony Diprose to skate in for his first try of the season.
Williams added the conversion, his fourth of the day, in what was to prove a profitable match for the former Stade Francais full back, who landed nine of his 11 conversion attempts from a variety of positions during the afternoon.
Williams had also opened the Quins scoring after the visitors had gone three points behind to a second minute Luke Richards penalty, thanks to a delightful piece of attacking play involving Nick Duncombe, Ben Gollings - given his first start in the first XV at fly-half - and Fijian centre Satala starting at outside centre.
Three minutes later and Duncombe and Gollings were again involved to put Matt Moore in for his first try of the afternoon, and one already began to fear for Caerphilly as Quins moved swiftly through the gears.
Richards halted the Quins try rush with a penalty, to narrow the gap to eight points, and the home side might have got a lot closer after setting up a series of raids close to the Quins line that looked certain to yield a try.
Somehow Quins survived almost four minutes of constant pressure and quickly showed their class with a classic breakout that almost produced a score up the other end, before a lineout allowed Bruce Starr to supply Duncombe with the ball and the scrum half scampered in along the blindside for a try and a 21-6 lead.
Quins quickly strengthened their hold on the game with a two try burst that yielded scores for Rob Jewell, that went unconverted, and Luke Sherriff in the opening minutes of the second period, but the home side refused to throw in the towel and Ryan Howells forced his way over shortly afterwards for a try that Richards converted and a 20-47 scoreline.
Duncombe went over for his second try of the game to see Quins past the 50-point barrier before being replaced by Scott Bemand, who almost had a hand in the visitors ninth try as Quins continued to run the ball from all parts of the field.
Gollings grabbed a ninth try when he ran on to a Tony Diprose grubber to score in the left hand corner and Tani Fuga was denied a try when the French referee Eric Darrlera penalised the home side for illegally halting a rolling maul to award the visitors a penalty try despite the Quins hooker being in possession and on his feet close to the line.
Williams continued to add to his tally with two more conversions that saw Quins push out to 68-20, and the Premiership side completed the scoring six minutes from the end courtesy of Simon Miall, who ran in following a scrum shortly after Caerphilly had been reduced to only 14 men when fly-half Luke Richards went off injured.
Yellow cards for Richard Skuse, who lists boxing as his hobby, cut the visitors down to 13 men, but Quins ended a man short themselves a minute from the end when Fuga's yellow card made it a hat-trick of yellow cards for Quins Samoan contingent in successive weeks.
During week commencing 22nd April Harlequins will launch an innovative, new Membership Scheme which will replace the existing Season Ticket Holder Programme. Further details of the scheme will be announced in due course.