This is “Rebecca Lawton Week” on The Write Spot Blot. Today’s inspiration for “Just Write” is from her book, Reading Water, Lessons from the River: The water-level fluctuations, both daily and seasonal, gave us regular lessons in how the river varied depending on flow. The thalweg, or deepest or best navigable channel, didn’t always follow a direct path. On one key day early in my training, I followed a boatman friend named John through the long, straight, placid reach of the Stanislaus below Razorback Rapids. As I rowed down the middle of the river, choosing the course where the main flow had been weeks before, I noticed John’s boat meandering from one side of the river to the other. He kept his hands on the oars but barely exerted himself, simply using the oars to adjust his boat’s position on the water surface. He moved briskly downstream through the calms…