“Then, sir, you will turn it over once more in what you are pleased to call your mind.”
Quoted by Thomas Arthur Nash in The life of Richard Lord Westbury, formerly Lord High Chancellor (1888) vol. 2, p. 292 http://archive.org/stream/liferichardlord00nashgoog#page/n308/mode/2up/search/Then+sir+you+will+turn+it+over+once+more+in+what+you+are+pleased+to+call+your+mind: Early mentioning of Mental rotation
