LEGO 6080 King's Castle Set Parts Inventory and Instructions - LEGO Reference Guide
LEGO vintage Castle Dungeon Hunters (6042) No Original Instructions or Box | eBay
Free LEGO Instructions 6080 Kings Castle
LEGO Black Falcon's Fortress Set 6074 Instructions | Brick Owl - LEGO Marketplace
BrickLink - Set 6074-1 : LEGO Black Falcon's Fortress [Castle:Black Falcons] - BrickLink Reference Catalog
I started with some mint condition Pirates Eldorado instructions, and stumbled upon a well-priced goldmine! (More info in captions & comments) : r/lego
LEGO 6080 Kings Castle Instructions, Castle
LEGO 6080 King's Castle Set Parts Inventory and Instructions - LEGO Reference Guide
LEGO 6073 Knights Castle Instructions, Castle
LEGO 6080 King's Castle Set Parts Inventory and Instructions - LEGO Reference Guide
6080 King's Castle - LEGO instructions and catalogs library