Can anyone help me translate this Lancashire dialect phrase 'O Full True un Pertikler Okeawnt...'

The sentence quoted It's a Don's Life by Mary Beard says it is a satirical account of going to the Great London Exhibition:

A full true and particular account what me and my mistress did (done/have) hear(d) while going to the Great Exhibition in London.

It's a quote from Vissit to Th' Greyte Eggshibishun

Okeqwnt is a typo in Beard. The original text says Okeawnt which is more recognizable as account.

Mistress here likely refers to his employer rather than his paramour ...