By Samuel Meade Marcus Smith led Harlequins to a large slice of history as the London outfit won a European Cup knockout tie for the first time. The Premiership side have continued to come up short in Europe’s top tier, despite winning the Challenge Cup several times, but righted those wrongs with a 28-24 victory over Glasgow Warriors on what was a damp April night in south west London. The Scots headed south of the border with some stellar form behind them, winning five on the bounce, and showed promise from the third minute, when they first took the lead. They also responded with two quick s…