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.
Subsequently, he was able to support himself financially, allowing him to focus exclusively on literary and scholarly activities. Despite his wife's passing in 1815, he remained in London until his poor health compelled him to relocate to Wales in 1825.