Historical clue formulations

• "The Rock" — 2026-03-29
• Island near 67-Across — 2015-10-26
• Pen that's no longer used — 2015-04-10
• Former penitentiary in San Francisco Bay — 2013-11-04
• The Rock — 2009-04-19
• The Rock — 2008-07-23
• The Rock — 2008-04-29
• San Francisco tourist attraction — 2003-01-25
• The Rock — 2002-02-27
• Infamous pen — 1997-09-26
• Island with a view of the Golden Gate — 1997-08-23
• Much-filmed prison — 1997-07-16