F09_P09: Undercover Address Rua Alexandre Herculano, 41, Lisbon

1943 December 2, Front side - Envelope from Warsaw to Rua Alexandre Herculano, undercover address.: Tan envelope (appears yellow with scan) with cursive handwriting in blue ink. At the center is a cancellation dated December 2, 1943. At the top right corner is a 50-pfennig blue stamp depicting Adolf Hitler facing to the right. To the left is a stamp depicting the Reichsadler. A large blue ink marking from the center left edge to the bottom right is present. The foundation is promptly working to update this scan.
1943 December 2, Front side - Envelope from Warsaw to Rua Alexandre Herculano, undercover address.

Tan envelope (appears yellow with scan) with cursive handwriting in blue ink. At the center is a cancellation dated December 2, 1943. At the top right corner is a 50-pfennig blue stamp depicting Adolf Hitler facing to the right. To the left is a stamp depicting the Reichsadler. A large blue ink marking from the center left edge to the bottom right is present. The foundation is promptly working to update this scan.

Name/Title

F09_P09: Undercover Address Rua Alexandre Herculano, 41, Lisbon

Entry/Object ID

2007.9.9

Scope and Content

1943 December 2, envelope from Warsaw to Rua Alexandre Herculano, undercover address.

Context

Rua Alexandre Herculano, 41, Lisbon, Portugal, was the undercover address for the Polish Red Cross headquarters in London. This December 2, 1943, envelope from Warsaw to the Rua Alexandre Herculano, 41, undercover address was scrutinized by the German censors at Munich, who searched for secret writing in invisible ink before passing it. A Lisbon transit marking is dated December 14. When the envelope reached London, four different files - records of the Red Cross, the Postal Section, the Department for Families of Army Personnel, and the Section for Social Welfare of the Air Force Inspectorate - were searched for the recipient's location before it was finally delivered to Polish Naval Headquarters, a successful clandestine communication that slipped past the Nazis in spite of their attention to detail.

Collection

Nazi Scourge I: Primary Exhibition

Category

Cover
Philatelic Material

Lexicon

Nomenclature 4.0

Nomenclature Secondary Object Term

Envelope

Nomenclature Primary Object Term

Container, Document

Nomenclature Sub-Class

Writing Accessories

Nomenclature Class

Written Communication T&E

Nomenclature Category

Category 06: Tools & Equipment for Communication

Archive Details

Date(s) of Creation

1943 - Dec 1943

Primary Language

English, Polish, German

Ethnography

Cultural Region

Region

Central Europe, Western Europe

Continent

Europe

Dimensions

Dimension Description

Measurement of the full length and width of the archive.

Width

3-5/8 in

Length

7-1/16 in

Relationships

Related Places

Place

City

Warsaw, Lisbon

Country

Poland, Portugal

Continent

Europe

Region

Western Europe

General Notes

Note Type

Cataloging Note

Note

C. Walrich - Updated (Jan 22 2026) C. Walrich - Updated Title (Feb 26 2026) C. Walrich - Back-Up Material (Mar 12 2026) C. Walrich - Back-Up PDF (May 7 2026)