I hadn’t known until then that the very same Andrew Carnegie of Carnegie Hall also funded well over a thousand public libraries (the Carnegie Libraries) after he sold his enterprise for $480 million back in 1902. So, Brentford and Hanwell both got their public library from him.
Interesting little local finding.
Andrew Carnegie, to quite Wikipedia, is known for having, later in his life, given away most of his
riches to fund the establishment of many libraries, schools, and
universities in Scotland, America and worldwide.