limit

"Even my limited sense of humour could evolve a better joke than that.

But with me there is a limit, and when I find a man who keeps his cigars in the coal-scuttle, his tobacco in the toe end of a Persian slipper, and his unanswered correspondence transfixed by a jack-knife into the very centre of his wooden mantelpiece, then I begin to give myself virtuous airs.

It was limited to Diana and Anne at first, but soon it was extended to include Jane Andrews and Ruby Gillis and one or two others who felt that their imaginations needed cultivating.

It presented, as the astute reader will have already perceived, few difficulties in its solution, for a very limited choice of alternatives must get to the root of the matter.