Chart of the Baltic or East sea: with Plans of the Principal Harbors.., 1864BalticSeaChart description Chart of the Baltic or East sea: with Plans of the Principal Harbors and views of the most important Lighthouses, Beacons & c. James Imray & Son. (publisher). London, with ten inset maps and drawings of lighthouses – including Memel harbor and lighthouse. Year 1864 Author – Sources Cartographic and Geological Institute of Catalonia: https://cartotecadigital.icgc.cat/digital/collection