In 1890, Daisy Ashford wrote The Young Visiters, a novella parodying upper-class English society. That might seem unremarkable—but the author was 9 years old:

They all went out by a private door and found themselves in a smaller but gorgous room. The Prince tapped on the table and instantly two menials in red tunics appeared. Bring three glasses of champaigne commanded the prince and some ices he added majestikally. The goods appeared as if by majic and the prince drew out a cigar case and passed it round.

One grows weary of Court Life he remarked.

The whole immortal thing is here.