We had to do some fast talking to get it.

He continues to make prints until 1665. So he is simultaneously painting, drawing and making prints.

Unlike a painting or a drawing, a print can be in multiple impressions.

In his early work you won't see this kind of dramatic presentation. And what's interesting is the treatment of light and dark is actually a service to the subject. It brings it all together and emphasizes the subject.

One of the things you'll notice about the sky is that he's taken a horizontal format: Holland is flat. The sky is rarely depicted other than as a foil to all of the detail in the foreground and his horizon line is often very low.