2022Todd Mueller Autographs, Inc.Robert Patterson & William Robertson- Check and ALS from 1868See Sold Price
2020William Bunch Auctions & Appraisals1778 "The History of America" Robertson, Complete inSee Sold Price
2019Hargesheimer Kunstauktionen DuesseldorfGEORG III-KANNE England, London, William Robertson,See Sold Price