Rennie lost the contract and he blamed the poor works on his contractors. In 1814, George again worked with Rennie, this time as resident engineer on the Stoneleigh Abbey bridge project. It is possible that Rennie's willingness to re-employ George on an engineering project shows how little he prioritised the project.

In 1830, Charles Jr. had retired through ill health. By the mid-1830s it appears that the family of engineers firm had ceased to trade; one of the last Jones projects was that of