Now fellas, particularly RJ, if you are going to speak of Maxwell Rolls reverently---matter of fact if you are going to speak of them at all you must get the spelling correct.
It is Maxwell Rolls, not Maxwell rolls. The reason for that is his Rolls are green contours for sure, perhaps the best ever created on golf putting greens and because they were considered so special when he did them, their double entendre is a combination of the names of the two finest automobiles of Perry's day---eg the Maxwell and the Rolls Royce.
Because of the significance of the Rolls Royce noone would ever think to spell it rolls royce and when referring to those special details that make up the gorgeous Rolls Royce automobile, there is no such lowest common denominator of that car that is called a "Roll".
As for how Perry Maxwell and crew did them I'm with Jim Urbina's thought on them when he was standing on the fascinating 9th left green at PVGC that Perry and the crew must have just free floated those greens by eye. Not to mention that the "Forgotten Man"---Maxwell's famous Wood Bros must have been ultra talented that way.
Unless Chris Clouser has some Maxwell green drawings that are so detailed in numerical dimension I would have to think Jim Urbina is correct.
By the way, on the 10th green of Ross's Charles River G.C. there are two lowish rolling mounds in the middle of that green which are about as typical of Maxwell Rolls as any Maxwell Rolls anywhere else are. Ross built that course in 1921 and Maxwell may've still be on his grand tour studying architecture at that point. Maxwell certainly toured the East. Did those contours on the 10th of Charles River G.C. inspire him to do what became famous as Maxwell Rolls?