strictly limited to a specified thing, place, or idea the city proper

It's definition 6 from Merriam-Webster: 6 : strictly limited to a specified thing, place, or idea

The mortgage document which secures the promissory note by giving the lender an interest in the property and the right to take and sell the property—that is, foreclose—if the mortgage payments aren't made.

On account of

In honor of, or in the name of

In the best interests of

Acting as a representative of or substitute for (someone or a group)

in the sense of for the benefit of

in the sense of as a representative of

The specimen copies are made from.