F07_P04: Great Britain’s Secret War against the Axis Bletchley Park

1943 April 29, Front side - Envelope from Sorina to Dick Perceval in London. 2007.7.4.a: Blue envelope with adhesive stickers adhered at the center, right, and left edge. Cursive handwriting in blue ink and pencil is present at the center. At the top right is a 50-pfennig green stamp depicting Helvetia, Switzerland with a plane flying above. Overtop is a cancellation dated April 29, 1943. At the top left is an imprinted blue ink stamp notifying air postage.
1943 April 29, Front side - Envelope from Sorina to Dick Perceval in London. 2007.7.4.a

Blue envelope with adhesive stickers adhered at the center, right, and left edge. Cursive handwriting in blue ink and pencil is present at the center. At the top right is a 50-pfennig green stamp depicting Helvetia, Switzerland with a plane flying above. Overtop is a cancellation dated April 29, 1943. At the top left is an imprinted blue ink stamp notifying air postage.

Name/Title

F07_P04: Great Britain’s Secret War against the Axis Bletchley Park

Entry/Object ID

2007.7.4.a-b

Scope and Content

1943 April 29, envelope and letter from Sorina to Dick Perceval in London.

Context

Sorina Perceval entered Germany in December 1942 to visit her son Wolf. Whether that was a mother's brave (or foolish) act, or a secret mission (if so, for which side?), is not publicly known. Another son Horst was killed on the Russian front in 1943. This April 29, 1943, cover from Sorina to Dick Perceval is addressed to him at the English Speaking Union Club, 37 Charles Street, London, S.W.1, a previously unrecorded undercover address. A German censor at Berlin applied a chemical to the envelope and letter to check for secret writing in invisible ink. A British censor inserted a mimeographed form warning the recipient not to heed a request for photographs. Upon delivery at London, the forwarding label to the secret Bletchley address was added, taking the letter to Perceval’s post.

Collection

Nazi Scourge I: Primary Exhibition

Category

Cover, Letter
Philatelic Material

Lexicon

Nomenclature 4.0

Nomenclature Secondary Object Term

Envelope

Nomenclature Secondary Object Term

Letter

Nomenclature Primary Object Term

Container, Document

Nomenclature Primary Object Term

Correspondence

Nomenclature Sub-Class

Writing Accessories

Nomenclature Sub-Class

Other Documents

Nomenclature Class

Written Communication T&E

Nomenclature Class

Documentary Objects

Nomenclature Category

Category 06: Tools & Equipment for Communication

Nomenclature Category

Category 08: Communication Objects

Archive Details

Date(s) of Creation

1943 - Apr 1943

Primary Language

German

Ethnography

Cultural Region

Region

Central Europe

Continent

Europe

Dimensions

Dimension Description

Measurement of the full length and width of the archive.

Width

4-1/2 in

Length

6-3/4 in

Dimension Notes

2007.7.4.a

Dimension Description

Measurement of the full length and width of the archive.

Width

8-1/8 in

Length

11-5/8 in

Dimension Notes

Measured unfolded to fullest width and length. 2007.7.4.b

Relationships

Related Places

Place

Country

Great Britain

Region

Western Europe

Continent

Europe

General Notes

Note Type

Cataloging Note

Note

C. Walrich - Updated (Dec 30 2025) C. Walrich - Updated Title (Feb 27 2026) C. Walrich - Back-Up Material (Mar 11 2026) C. Walrich - Back-Up PDF (May 7 2026)