New beginnings are not by definition good ones. It's not the time of year that invites that kind of gloom but rather Sean O'Brien. Leinster players trained on Monday. There was Jamie Heaslip, in Ireland and bounding into action. Here was Dominic Ryan, eschewing the tracksuit tops and tights worn by team-mates and favouring a short-sleeved jersey and regular togs. There were back rows dotted throughout the session, but the best one available to Leinster and Ireland was not there.