On our way back from the Northwoods, we stopped in Duluth at the harbor.  We almost did not swing thru Duluth; driving south as we approached a split in the road (south to highway 33 and Cloquet), we waffled on whether to bypass Duluth and get home a little earlier.  I decided I wanted to at least get a glimpse of the lake.  We remembered that there is free parking in the winter in the harbor area – it was set, we would take a stroll in Canal Park.  Unbeknownst to us, the Cason J. Callaway was heading out of port to pickup a load of taconite in Two Harbors.