Jim
Maid of Australia. Insider knowledge???

Butter and Cheese and All. The insides of chimneys in many large houses in towns and country had these rungs for the cleaners to ascend. Some even had little sections where one could hide from religious persecutors like Priest Holes.

The Mowing Match is not part of the corpus under consideration. I'm not aware of any versions being collected in Sharp's time or by his contemporaries. There were plenty of songs about mowers but these do not contain any 'insider knowledge' unless you count sexual euphemisms as insider knowledge.

The Broken Token was as you say very common during the period when these songs were being made and common knowledge to all. Very definitely NOT insider knowledge.