Folder Paper With Typed Notes Regarding "Die Trial"?

Hello again!

To give some context first... I recently won/purchased a "Mystery" lot filled with items at a local in-person auction house in the DE/PA area. It has everything from British colonial era buttons in apparently virtually unused condition, US & Philippines Silver Certs/banknotes, US coins, foreign coins from 1700-1800, & more... including this folded up piece of paper stored in an old banknote envelope.

It seems it could be a student's essay/paper about a die trial, but I had not heard of this sort of thing, so I wanted see if anyone here could tell me more about Die Trials & maybe give some more insight into this paper says. It may be nothing, but I still find it very interesting!

I have included pictures of the paper below, but just in case it's too blurry to read it says...

"DIE TRIAL OF A PROPOSED PATTERN WITH
THE DATE IN A VERTICAL POSITION UNLIKE
ANY PATTERN COIN LISTED IN JUDD •
UNIQUE 1877 DIE TRIAL IN PLASTER OF
PARIS-THE OBVERSE OF A PATTERN BY
GEORGE MORGAN WITH THE HEAD DESIGN
BASICALLY SIMILAR TO THE Morgan dollar
OF 1878 to 1921. THE LEGEND INCORPORATES
"E PLURIBUS UNUM" ON THE LEFT
AND THE DATE POSITIONED VERTICALLY ON
THE RIGHT WHICH IS UNLIKE ANY KNOWN
PATTERN COIN. 1877 WAS THE YEAR IN
WHICH SO MANY DESIGNS WERE PROPOSED
FOR HALF DOLLARS BY MORGAN AND OTHERS,
AND THIS MIGHT BE A PATTERN FOR A
QUARTER, AS IT IS ABOUT THAT SIZE."