David Bolton's explanation of the struggle to preserve the canal heritage is very readable. As well as being factual, there's a slightly gossipy beginning, which reveals the very differing characters of Tom Rolt and Robert Aikman. They are shown as two rather unusual men with a joint, if differing approach to their passion. Maybe the abrasive struggle was the strength that allowed them to succeed in an almost un-winnable battle. This battle was a race against more than time. It was a race against bureaucracy, neglect, finance, ignorance and ultimately one another. And it's never quite won.