He had access to the documents preserved in the Tower, and occupied himself in making extracts from them.
The leaves are generally used to make "extracts" that are used as medicine.
John Anderson Adams, began making and selling extracts in Michigan in 1888.
From everything he read he made long extracts, and kept a book of "thoughts."
The leaf, stem, and root are used to make "extracts" which contain a high concentration of certain chemicals found in the plant.
Toplady used to make copious extracts from it in his common-place book.
They may take away, copy or make extracts from documents produced to them.
For you are a young lady of deep reflection, I know, and read great books and make extracts.
They are unusually skilled at making pulps and extracts of plants for curing illnesses.