A decade before Walt Disney released his first animated short, “Alice’s Day at the Sea” in 1924, illustrator Louis Glackens (1866-1933) created trailblazing animated shorts featuring mermaids, anthropomorphic beasts, and political satire. His career has often been treated as a footnote to that of his younger brother, Ashcan School artist William J. Glackens.[1] Both Glackens…