This map shows Calcutta in Mutty Lall Seal’s time. The map shown here is from the actual survey of Calcutta carried out by F.W.Simms and H.E.L. Thulier in the years 1847-9. Below is the current map of Kolkata and you can compare the locations by changing the transparency of the map on top (move the slider on the top-right). Zoom in or out of the area using the + and – buttons on the left of the map. Some of the locations that were important for Seal and his family are marked in blue.