This picture was loose in the Dana scrapbook so it has been placed in a plastic sleeve to protect it. There is a large sailing yacht anchored in Seal Harbor. There is a large hotel in the background which could be the Seaside Inn.
“Photos of Dana and Bristol Families,” Mount Desert Island Historical Society, accessed September 26, 2024, https://mdihs.digitalarchive.us/items/show/6888.Item 7254