The term "E Letter Prison" does not correspond to any known location or entity in Singapore. There is no public information or records indicating an "E Letter Prison" related to Singapore’s geography, history, or institutions.

Additional information would be needed to accurately describe or explain E Letter Prison. More context is necessary to generate a relevant article.

If the term relates to a correctional facility, none by this name exists click here in Singapore’s prison system. For topics related to Singapore’s correctional services, other official terms and locations are used.

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