After this he enjoyed a private income which meant that he was able to devote his whole time to literary and scholarly pursuits. He remained in London after 1815, when his wife died, but with his health declining he returned to live in Wales in 1825.
After this, he had the financial independence to devote all his time to intellectual pursuits. He stayed in London after his wife's death in 1815 but eventually returned to Wales due to worsening health in 1825.