Boston Harbor.
From Eastern Point Lighthouse 215° (SW. ⅜ W.) 15¾ miles, to The Graves Lighthouse; thence 139¼° (SSE. ⅜ E.), 7½ miles, to Minots Ledge Lighthouse.
From Eastern Point Lighthouse 215° (SW. ⅜ W.) 15¾ miles, to The Graves Lighthouse; thence 139¼° (SSE. ⅜ E.), 7½ miles, to Minots Ledge Lighthouse.