The New Haven provisional envelopes were issued in 1845 and 1846 by Postmaster
Edward A. Mitchell (1815-1876). Mitchell received his postmaster’s appointment
from President John Tyler on September 12, 1844. This followed Tyler’s decision
not to run for election and, instead, to endorse James K. Polk, the Democratic
Party candidate and a strong advocate for Tyler’s cause of Texas annexation.
Mitchell took over as New Haven’s postmaster on October 24 and served four years
under the Polk administration. He was replaced on July
2, 1849, by John B. Robertson, a Whig Party follower appointed by President
Zachary Taylor.
The origin of the device used to make the New Haven provisional stamped
impressions has been well documented in a book published in 1932 by Carroll
Alton Means (The New Haven Provisional Envelope). The handheld
brass die still exists and is located at the Whitney Library in the New Haven
Museum (previously known as the New Haven Colony Historical Society). Also
located at the library is a drawing of the New Haven provisional design, which
is unsigned, but was donated by the foster son of Augustus E. Lines, a prominent
engraver and jeweler in New Haven during the years Postmaster Mitchell issued
his provisional envelopes.