“Gaslight” in the novels of Charles Dickens, especially “Our Mutual Friend” (1865)

When I came across a reference to a "flaring gaslight" in Charles Dickens's "Our Mutual Friend" (1865), I chuckled at how the word "gaslighting" has since taken on a meaning that Dickens could not have guessed at, but I also wondered if it was the first reference to gas lighting in Dickens. A concordance search revealed that I missed references to "gaslight" in Dickens's earlier novels "Martin Chuzzlewit" (1844), "Hard Times" (1854), and "Little Dorrit" (1857), but gas lighting must have been getting more and more present in England in the course of his life, as six of the eleven appearances of "gaslight" in his novels are in "Our Mutual Friend". (Andrew Shields, #111words, 30 July 2023)