This census has slowly grown over the past six years, including a tenth Tau Doane cancel. JT of Goodwin Philatelics recently discovered the first 2-cent Washington stamp (Scott #319) with a Doane cancellation on a small envelope piece. Interestingly, this postmark does not have a year and is similar to Tau-7, where the day and postmark hour are recorded.
Tau Doane cancel #10 in the census.
Tau-7 was clearly used after the 1-cent Jamestown stamp (Scott #328) was issued on April 25, 1907. I’m assuming the newly discovered Tau-10 was also posted later in the 1900’s decade.
Tau-1
Tau-2
Tau-3
Tau-4
Tau-5
Tau-6
Tau-7
Tau-8
Tau-9
Tau-10