Tonga or Friendly Is. Map by C.J. Lyons. C.J. Lyons, J.F. Brown, M.D. Monsarrat and Wm. Finished map by Richd. Slight fold browning.
Triangulation sketch only.
As Surveyed To March 1, 1880. Additions By C. H. Ourand. XXIV from the Annual Report 1883, U.S.G.S, updated ten years later. Reproduced from an unidentified sea chart circa 1890. Additions By C.H. Ourand, Feb. 1893.