What was Jerome's opinion of locks?

From the text:

For myself, I am fond of locks. They pleasantly break the monotony of the pull. I like sitting in the boat and slowly rising out of the cool depths up into new reaches and fresh views; or sinking down, as it were, out of the world, and then waiting, while the gloomy gates creak, and the narrow strip of day-light between them widens till the fair smiling river lies full before you, and you push your little boat out from its brief prison on to the welcoming waters once again. ch 18