| Date Note | 1816 watermark, predates 1819 Transaction paper |
| Administrative History | The map may have been produced as a part of the research for the paper: Strangways, W T H F, "Geological Sketch of the Environs of Petersburg", 'Transactions of the Geological Society of London', Series 1, Vol 5 (1821), pp392-458, as the area is similar to the map produced as plate 28. Strangways was a diplomat who was posted to St Petersburg between December 1816-June 1820. |