Fig. 3

The re-constructed course of the Prinzess Louise passing Babuyan Claro island in August 1831. The use of this static ArcGIS map image is permitted in academic publications (including research journals) with the following source attribution: Esri, HERE, De Lorme, MapmyIndia, (c) OpenStreetMap contributors, and the GIS user community. (https://doc.arcgis.com/en/arcgis-online/reference/static-maps.htm, accessed 22/02/2018)