Jaan and Will notice that the word Canal is batted around a bit (Troi has more insight into this already), and they do note a lack of anyone other than dock workers and carts.
Lasair gathers that the Canal was built with funds from one of the older Barons who liked the land in the area, and was a boon to trading and shipping, allowing Earling to grow large dispite not having a major water body near. It is used almost entirely for goods shiping, and for the most part, barges are used to pull things down to the River Insight, a tributary to the Mystic River. Most people laugh when you ask if they've seen anything unusual, and if you ask about Niobe and her kidnapper(s), they seem much more concerned. One gentileman suggests you ask the night guard, as the docks usually close before midnight, and open again an hour before sun-up.
Wil helps Lasair, and notes that perhaps unusuall things are common at the dock, and some places like this have been known to be places where illicit business is done.