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He returned to City
College in 1920 as a professor of history. He remained interested in cryptography, writing papers and became interested in the history of the topic, collecting many books on it.
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He led a team dealing with German diplomatic correspondence, breaking at least six diplomatic ciphers. Two messages dealt with German attempts to get support from Mexico.
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His library, which had been called "probably the most important cryptographic library in
America, if not in the world" was bequeathed to the University of Pennsylvania.
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and he was recruited into
Military Intelligence, section 8 (MI-8). From 1918–19 he was a captain in the Military Intelligence Division of the
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as a tutor in Greek in 1905, becoming an instructor in 1907. He was a professor of ancient languages in 1917.
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in 1917, dealing with foreign language, postal and newspaper censorship. His work came to the attention of
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He had never married and was survived by his mother. He was buried in the Hebrew
Cemetery at
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He remained in contact with
Herbert Yardley and did part time cryptographic work for the
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The
Zimmermann Telegram of January 16, 1917, and its Cryptographic Background
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The
Zimmermann Telegram of January 16, 1917, and its Cryptographic Background
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Studies in German
Diplomatic Codes Employed During the World War
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Studies in German
Diplomatic Codes Employed During the World War
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North
Carolina Department of Natural and Cultural Resources
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Burials at Oakdale Cemetery (Wilmington, North Carolina)
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In 1939, he was recalled to active duty as a result of
313:"Wilmingtonian Decodes German War Correspondence"
19:(December 8, 1880 – September 27, 1939) was an
92:he served in the censorship department of the
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364:American people of Lithuanian-Jewish descent
389:American military personnel of World War I
60:in 1896. He was a Harrison Scholar at the
379:Writers from Wilmington, North Carolina
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239:Dictionary of North Carolina Biography
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311:Bandel, Jessica (November 9, 2017).
153:, but while preparing he contracted
374:Jewish American non-fiction writers
177:Studies in the Word-Play in Plautus
244:University of North Carolina Press
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359:American male non-fiction writers
78:College of the City of New York
167:, Wilmington, North Carolina.
129:. Together they published the
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72:in 1904. He was a member of
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62:University of Pennsylvania
42:Wilmington, North Carolina
17:Charles Jastrow Mendelsohn
354:American cryptographers
118:Return to civilian life
384:Deaths from meningitis
94:Post Office Department
52:He graduated from the
131:Universal Trade Code
37:and Esther Jastrow.
271:Funk & Wagnalls
266:Jewish Encyclopedia
112:honorable discharge
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35:Samuel Mendelsohn
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66:Bachelor of Arts
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320:. Retrieved
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90:World War I
338:Categories
193:References
155:meningitis
28:classicist
322:March 16,
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48:Education
21:American
88:During
145:Death
32:Rabbi
324:2018
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137:and
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70:PhD
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