When Joe Willcocks left Ireland for Upper Canada in 1799, he said goodbye to the "Second City of the British Empire" to seek his fortune in "Muddy York."Both Dublin and Toronto are thriving in the 21st century. In Dublin, far more than Toronto, it's still possible to get a feel for the city as it once was. Last week, we had the privilege and pleasure of a barge ride through the transportation system that helped make Dublin such a wealthy city in Willcocks's day.