| Type | Name | Year | Photos |
|---|
| Object | Letter from the Treasurer of Round Island Park | 1883 | * 1 |
| Photograph | "Yachts at the Frontenac Dock, Thousand Island Series" | c1890-1911 | * 2 |
| Book | "The New Frontenac" | c1899 | * 3 |
| Photograph | 1577 "Hotel Frontenac from the River" | c1900 | * 4 |
| Photograph | Stereoview of Round Island, 1000 Islands, NY | c1900 | * 5 |
| Postcard | A 6275 "Boat Scene at Frontenac, Thousand Islands, N. Y." | c1905 | * 6 |
| Postcard | G 6275 "Boat Scene at Frontenac, Thousand Islands, N.Y." | c1905-1907 | * 7 |
| Postcard | G 6276 "Hotel Frontenac, Thousand Islands, N.Y." | 1905 | * 8 |
| Kitchen Item | Wedgwood blue transferware plate, Hotel Frontenac, 1907 | 1907 | * 9 |
| Postcard | "Thousand Islands Frontenac Yacht Club" | 1908 | * 10 |
| Postcard | "Thousand Islands, N.Y., The Frontenac.", color postcard | 1908 | 11 |
| Postcard | Postcard, "THOUSAND ISLANDS Tennis Fourts, Hotel Frontenac" | 1909 | * 12 |
| Silver | Hotel Frontenac sterling silver souvenir spoon | c1910 | * 13 |
| Postcard | "Burning of the Frontenac Hotel - Midnight Aug.23d '11" | c1911 | * 14 |
| Postcard | "The Frontenac Fire Aug 23-1911" | c1911 | * 15 |
| Postcard | "Thousand Islands, N.Y., The Frontenac" | 1911 | * 16 |
| Postcard | "Frontenac Hotel, Frontenac, N.Y." color postcard | c1915 | * 17 |
| Kitchen Item | Wedgwood blue transferware plate, Hotel Frontenac, 1915 | 1915 | * 18 |
| Postcard | 3975 "Thousand Islands, N.Y., The Frontenac." | | * 19 |
| 19 items |