waltermiller

Could be the actor (1892-1940)

en.wikipedia.org/wiki/Walter_Miller_(wrestler)
"Walter Miller was the middleweight wrestling champion in 1919"
But the picture Seuss links to was when he was a welterweight.
See the picture in the Bismarck Daily Tribune. November 02, 1915, page 8
- chroniclingamerica.loc.gov/lccn/sn85042242/1915-11-02/ed-...
and I think this picture is at the lighter weight too.

The negative is numbered 2371-8
See negative 2731-9 at
-

Walter Miller was the middleweight wrestling champion "Championship Wrestling Match on Card for Thursday. This wrestling bird, who will light into Walter Miller for the middleweight title at the Los Angeles Athletic Club Thursday night, reached the city at 11:30 ... " Source: Los Angeles Times; May 6, 1919 "Walter Miller is still the middleweight wrestling champion of the world. Last night at the Los Angeles Athletic Club the peerless mat expert and grappling ... " Source: Los Angeles Times; May 9, 1919 I will start a Wikipedia entry for him: Walter Miller

From Edith Dodd Culver's THE DAY THE AIRMAIL BEGAN: "To quote from Reuben Fleet's 1966 speech before the Air Mail Pioneers: "I left Lieutenant Webb in charge at Belmont Park and the Curtiss plant, with Lieutenant Miller and Bonsal helping, and in reserve, and instructed Webb to get the other four aerial mail airplanes ready, and fly one from Belmont Park with the aerial mail at eleven the next morning to Bustleton Field, which the Philadelphia Postmaster had selected for Philadelphia. Edgerton at Bustleton Field would relieve Lieutenant Webb there and fly on to Washington, while Lieutenant Culver would relay the aerial mail at Busttleton Park in New York."

Jean Dieuzaide – Concorde Essai de Freinge - 1968

Hi,
I'am the admin of the new group Art'flighing Machines dedicated to an artistic approach of flighing things

It would be an honour to have your picture into this group

Aviation was not very safe in 1918. I can't imagine some pilot risking his or her life to deliver a small package of mail from the NYC area to the Philly area, flying in an open cockpit with a small fuel tank. It made more sense to put it on a train in Manhattan and deliver it to Philadelphia city center in about 3 hours with a fraction of the cost and a fraction of the chance of disaster. Pilots often got lost in bad weather and ran out of fuel.