Paul Waterhouse, Dictionary of National Biography… (1912)
“ He solved the puzzle which all Vitruvius's commentators had found insoluble by identifying the 'scamilli impares' with those top and bottom blocks of the columns which, by virtue of the inclination of the column or the curvature of stylobate and architrave, are 'unequal' (i.e. they have their upper and lower faces out of parallel) . Some important conclusions relating to the Roman temple of Jupiter Olympius at Athens Penrose laid before the Institute of British Architects in 1888. ”
