21 covers ranging from the 1880s/1920s, includes cancellation types F and G, better frankings including, 3c and 5c Bureau Issues on 2c Columbian entire, 10c Columbian adhesive, 10c Columbian entire, 15c Bureau Issue on 5c entire, 5c Trans-Mississippi on 5c entire, 5c Pan-American on 5c entire, and more, generally fine to very fine, a wonderful group of these scarce covers on Graham Booth's exhibit pages