Partner from at least 1781
F.G. Hilton A handbook of London Bankers (1879)
Appearing in various iterations, the bank was formed c. 1765 when the partnership of Boldero, Carter and Boldero split. One of the two successor firms, Henry Boldero & Co., became Boldero, Kendall & Adey, then Boldero, Lushington, Boldero and variants. It failed in 1812.
F.G. Hilton Price A Handbook of London Bankers (1879), which gives the foundation as c. 1770.