The historic Bancroft textile mill was featured in my book, "The Brandywine: An Intimate Portrait" but now is collapsing. New townhomes have been added, at left. This quick watercolor sketch suggests its appearance in afternoon light, under the enormous yellow-brick smokestack. Artists ought to record endangered buildings like this one. William Bancroft, owner of the mill, established America's best collection of Pre-Raphaelite paintings.