Clay Island (Maryland)
Historical Light List Characteristics
| 1839 | F W. W15. | USLHE Light List (US): 150 |
| 1849 | F W. W12. | USLHE Light List (US): 162 |
| 1858 | F W. W10. | LHB Light List (US): 229 |
| 1860 | LHB Light List (US): 213 | |
| 1865-1866 | LHB Light List (All Coasts): 217 | |
| 1868 | LHB Light List (All Coasts): 220 | |
| 1870 | F W. W11. Arc illuminated N. 21 W. by E'd to N. 53 E. | LHB Light List (All Coasts): 231 |
| 1878 | F W. W11. Arc illuminated N. 1/2 W. by W'd to NE. 1/2 N. | LHB Light List (All Coasts): 295 |
| 1879 | LHB Light List (All Coasts): 299 | |
| 1886 | F WR. W111/4, R111/4. Red sector is unknown. | LHB Light List (All Coasts): 344 |
| 1888 | LHB Light List (All Coasts): 361 |
Historical Light List Optics and Structures
| 1839 | 10 Lamps / 15" Refl. | 16 | N/A | Light on keeper's dwelling. | USLHE Light List (US): 150 |
| 1849 | 10 Lamps / 16" Refl. | 24 | USLHE Light List (US): 162 | ||
| 1858 | 6th | 30 | 36 | LHB Light List (US): 229 | |
| 1860 | LHB Light List (US): 213 | ||||
| 1865-1866 | LHB Light List (All Coasts): 217 | ||||
| 1868 | LHB Light List (All Coasts): 220 | ||||
| 1870 | LHB Light List (All Coasts): 231 | ||||
| 1878 | Light on keeper's dwelling. House painted white; roof of lantern, red. | LHB Light List (All Coasts): 295 | |||
| 1879 | LHB Light List (All Coasts): 299 | ||||
| 1886 | 36 | 42 | Light on white dwelling; roof of lantern, red. | LHB Light List (All Coasts): 344 | |
| 1888 | Light on white dwelling; roof of lantern, black. | LHB Light List (All Coasts): 361 |
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1832 - 1891 (Approximate location.) |
