Related Clues:

• Got the lead out
• Dug for coal
• Dug up minerals
• Sought gold
• Like 14-Across
• Taken from veins, perhaps
• Like 19-Across
• Dug
• Availed oneself of
• Went for the gold, in a way
• Searched for a vein
• Went for the gold
• Looked for gold or silver
• Extracted with picks
• Extracted ore