Attached is a Memo of Stock Sale (STEWART BARR & CO.), but the stamps are cancelled with a date stamp. I'm looking for any revenue stamp(s) on document/instrument(s) with a cancel other than the date for Stewart Barr & Company. My example has R185's cancelled in June 1901.
If any members have an image, would be glad to see it, especially if it's readable.
Also any background information on the principles Mr. Stewart Barr, Mr. Frederick Fisher or Mr. John Bensinger around the time of the above cancel, or any other information or details.
Appreciate any help from other members.

Dave