Save-All, or Catch-All
"A small sail set under another, or between two other sails, to catch or save the wind." —Whitney, 1889
This illustration shows the save-all labeled with an "a". The hull of the boat as well as other sails and masts are visible.
William Dwight Whitney, PhD, LLD The Century Dictionary: An Encyclopedic Lexicon of the English Language (New York, NY: The Century Co., 1895) 5358