Winslow Homer (1836–1910) is known for his paintings of the Maine coast, the sea, and solitary figures braced against stormy weather. But for a concentrated period in the 1880s he turned to etching, revisiting his celebrated subjects in a medium that demanded a different kind of attention. The results are among the least-known works of his career and among the most technically ambitious. The Portland Museum of Art, which stewards Homer’s studio on the Maine coast and holds a landmark collection of his work, is now presenting these rare prints in dialogue with related paintings, drawings, and proofs. It’s the first comprehensive exhibition of Homer’s etchings ever staged. —Elena Clavarino