For an indefinite period. The N.E.D. supplies a quotation, 1616,

                        They drink round,
Vntill their adle heads doe make the ground
Seeme blew vnto them.
R. C., The Times’ Whistle, V. 1835.    

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1806.  

        The land we till is all our own;
  Whate’er the price, we paid it;
Therefore we’ll fight till all is blue,
Should any dare invade it.
The Balance, July 22 (p. 232/2), ‘New Yankee Doodle.’ (Italics in the original.)    

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