yeah yeah we all know of john field's nocturne. sort of get irritated about how people seem to only mention this guy in relation to chopin, when he was a fine composer that stood on his own.
It's not just John Field, Chopin and many other composers (like Mendelssohn, Liszt) took a lot ofrom the pioneers and super stars of the brilliant style form. This includes Hummels, Moscheles, Dussek, Cramer etc
Listen to John Field's piano concerto no. 2, you'll be pleasantly surprised. It's a beautiful early 19th century concerto, which evidently influenced the creative minds of the early romantic composers.