Read it through once

When I turned out, in the morning, we had passed Columbus, Kentucky, and were approaching Hickman, a pretty town, perched on a handsome hill. Hickman is in a rich tobacco region, and formerly enjoyed a great and lucrative trade in that staple, collecting it there in her warehouses from a large area of country and shipping it by boat; but Uncle Mumford says she built a railway to facilitate this commerce a little more, and he thinks it facilitated it the wrong way--took the bulk of the trade out of her hands by 'collaring it along the line without gathering it at her doors.'