qs

1) "Are you sure you don't mean foolscap and a quill?"

What's foolscap and a quill?

2) One of the meanings of the term sacrosanct is: above or beyond criticism, change, or interference.

What's the difference between 'above' and 'beyond' in the present context?

<<What's foolscap and a quill? >>

It should read: "fool's cap" --it's a hat worn by fools and may look like a hat with three hanging projections with bells at the ends, or like a dunce-cap, a conical hat.

A quill here bears back to the quill of a feather, often used as a writing implement

<<What's the difference between 'above' and 'beyond' in the present context? >>

To be "above criticism" means to be undeserving of criticism
To be "beyond criticism" can include being "above criticism", but can also imply that even when deserved it is not imputed (i.e. untouchable, or unable to blame even when worthy of such blame)