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flannan Player's Handbook, страница 159.
Skilled hirelings include anyone hired to perform a service that involves a proficiency (including weapon, tool, or skill): a mercenary, artisan, scribe, and so on.
The pay shown is a minimum; some expert hirelings require more pay. Untrained hirelings are hired for menial work that requires no particular skill and can include laborers, porters, maids, and similar workers.