Grantham House

Janet Roworth provides a summary and table of the owners of the National Trust's Grantham House. Ian Ross reveals the research behind the fire insurance mark on the house. The Belton Research Group provided a gazetteer to accompany James Edgar Historic Buildings Consultants' survey of the property in 2019.

GHG The Owners and Occupiers of Grantham House (text revised Nov 2019).pdf

Anne Brownlow, Lady Cust (1694-1779), the mother of Sir John Cust, insured Grantham House for £1,000 in 1768 (£180,000 2021). The Sun Fire Office fire mark recording the insurance is located on a north wall, red circle. By using the number embossed on this lead fire mark, 259606, we traced the original policy registration document to the London Metropolitan Museum, transcribed below. The Sun Fire Office is the oldest documented insurance company in the world. It was founded in London in 1710. It continues to trade under RSA Insurance Group Limited, formed from the merger of Sun Alliance and Royal Insurance in 1996.

Grantham House Sun Assurance firemark November 2019.pdf