7.5" x 8.5" printing or engraving block showing map of Southwest Harbor and Cranberry Isles. Although source is listed as unknown, it may have been part of a gift from Gail Reiber. (008.077.27) is a similar printing block.
“Map of Southwest Harbor and Cranberry Isles,” Mount Desert Island Historical Society, accessed April 3, 2025, https://mdihs.digitalarchive.us/items/show/2858.Item 3224