This workmanlike novel sets out to tell the story of those who ran canal boats of coal up and down the Chesapeake & Ohio (C&O) canal, between Washington DC (aka Washington City) and Cumberland, during the Civil War. It does so through the Fitzgerald family and their boat, "The Freeman" -- along with a subplot around a Confederate scout working around the Maryland-Virginia border, and a child of the Cumberland wharves who eventually joins the Fitzgeralds.
The action all takes place over roughly March-November 1863 and features a lot of idealism and romanticism. The father, Hugh, is a paragon of hard work, clean leaving, family first, and other such virtues, and his wife is a virtual saint. Naturally, they are involved in the Underground Railroad.Their children are all fairly stock characters, as are the Confederates, and pretty much everyone in the book.
The central theme is of how/whether the Fitzgeralds will be able to continue to work the canal in the midst of the war. This is filled out with various subplots, such as the romantic pursuits of the older Fitzgerald children, and small vignettes (encounters with Rebel snipers, a run-in with an obstreperous canal captain, etc...). It all keeps moving at a tidy clip, but it's really best read for a sense of life on the canal, rather than storytelling or characters. More interesting in the historical details than engaging as fiction.