Ta, Jacknatter. I could find no def for updraw in Chambers, so was trying to link it with updraft. There is a def for undraw - to draw back - which I thought might keep it in contention - could un mean top as in number one? ... cont. p94. Updraw it is - thanks again.
You're welcome - as you say, Chambers doesn't define UPDRAW but simply lists it as a compound. The two-volume OED gives it as '(rare) to pull out of the ground'; the most recent example of its use given by the 'full fat' OED is from 1449 (and I don't mean just before 3 o'clock...)!!