Category Nuances for personal_letters:

• everyday,
• private,
• cultural,
• written,
• confidential,
• short,
• literary,
• historical,
• personal,
• informal,
• formal,
• public,
• intimate,
• unpublished,
• unofficial,
• simple,
• related,
• unique,
• archival,
• original,
• connected,
• actual,
• imaginative,

Simple Categories for personal_letters:

• text,
• message,
• document,
• nature,
• item,
• object,
• papers,
• matter,
• writing,
• information,
• artifact,