Definition of "Lunnon"

If a sun-bonneted market woman got in with us, mother could never resist talking to her, and answering the invariable Cornish question: "Wheer be 'ee goin'?" Then would follow the astonished "From Lunnon are 'ee? Aw, my deer!"

1948 November and December, “By Broad Gauge to Cornwall”, in Railway Magazine, page 361