1863 - ????
A full-page advertisement shows the governance structure of the North British Insurance Co., headquartered in Edinburgh with its Board of Directors there and with a London 'Board of Management.'
The continuation of the firm was the North British & Mercantile Insurance Co. London and Edinburgh. Founded in 1809, the firm is a predecessor firm of Aviva.
Pigots 1837 National Commercial Directory of the whole of Scotland p. 179
The Directory & Chronicle for China, Japan, Corea, Indo-China, Straits, 1882; https://heritage.aviva.com/our-history/companies/n/north-british-and-mercantile-insurance-co-ltd/