Mrs Thatcher called the 'wets' in her party 'frit'. She's famously from Grantham, so it must be used in that area of Lincolnshire too.
"The moving finger writes, and having writ, moves on...' is Fitzgerald's rendering of a line of the Rubaiyat. The form 'having written' wouldn't have fitted but 'writ' does show a currency in correct, if archaic or poetic, English in his day.
'Emulate' for 'equal' or 'copy' confuses me. I think of it as meaning 'to strive to rival (but not equal)' so 'he is emulating the world record holder' when 'he' has equalled the world record time, seems odd, as does ' she is emulating (a star)' when 'she' is someone who just happens to look like the star.