Category Nuances for personal_letters:

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• unpublished,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

Simple Categories for personal_letters:

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