http://www.pbs.org/wgbh/nova/shackleton/1914/team.html
“MEN WANTED: FOR HAZARDOUS JOURNEY. SMALL WAGES, BITTER COLD, LONG MONTHS OF COMPLETE DARKNESS, CONSTANT DANGER, SAFE RETURN DOUBTFUL. HONOUR AND RECOGNITION IN CASE OF SUCCESS. SIR ERNEST SHACKLETON”
“MEN WANTED: FOR HAZARDOUS JOURNEY. SMALL WAGES, BITTER COLD, LONG MONTHS OF COMPLETE DARKNESS, CONSTANT DANGER, SAFE RETURN DOUBTFUL. HONOUR AND RECOGNITION IN CASE OF SUCCESS. SIR ERNEST SHACKLETON”
Yup. I think that was it. I'm pretty sure I originally saw it in a collection of stories and essays about empire put together by Jerry Pournelle. Wish I could find my copies of the 3 books in that series. It was pretty good.