Water thunders over the lip of the Great Stone Dam in a cascade nearly a city block wide — this hand-colored Edwardian card captures the raw industrial muscle of Lawrence, Massachusetts, where the Merrimack River was tamed in 1845 to power one of the largest textile complexes in the world. At 900 feet long and roughly 30 feet high, the dam was an engineering marvel of its era, and the smokestacks of the mills looming in the background remind us that this was not scenic tourism but industrial might made picturesque. On the back, a brief but touching note dated February 27, 1914, was sent from a sender named simply as the writer who signs off as W.H. — writing from 185 Hampshire St., Lawrence — to a woman named Alice in Georgetown, Maine: "Dear Sister, Have not heard from you for some time, hope you are not froze up. I have been but it is a little better now." A February check-in between siblings during a New England winter, preserved for over a century.