Historical clue formulations

• Gertrude who swam the English Channel — 2026-03-29
• Gertrude who swam the English Channel in 1926 — 2017-09-17
• Channel swimmer Gertrude — 2017-06-17
• Channel crosser Gertrude — 2011-01-16
• 1926 English Channel crosser — 2009-11-27
• Gertrude ___, first woman to swim the English Channel — 2009-10-11
• Channel swimmer Gertrude — 2007-08-08
• Gertrude who swam the English Channel — 2007-05-13
• - — 2006-05-14
• 1926 Channel swimmer — 2005-11-09
• Gertrude ___, the first woman to swim the English Channel — 2004-11-05
• 1924 Olympics star Gertrude — 2004-05-30
• Gertrude who swam the English Channel — 2003-09-07
• Channel swimmer Gertrude — 2003-01-20
• Channel swimmer Gertrude — 2002-10-09
• News-making 1926 Channel swimmer — 2001-12-16
• Channel crosser of 1926 — 2000-05-27
• Swimming sensation of 1926 — 2000-01-23
• 1920's swimming sensation Gertrude — 1999-08-25
• Channel swimmer Gertrude — 1999-02-09
• 1924 gold medal swimmer — 1998-08-16
• Channel swimmer Gertrude — 1998-02-22
• Channel swimmer Gertrude — 1997-05-07
• Channel swimmer Gertrude — 1996-09-11
• First woman swimmer of the English Channel — 1996-05-28
• Channel swimmer Gertrude — 1996-05-22
• Channel swimmer Gertrude — 1995-08-09
• First woman to swim the English Channel — 1995-06-24