He was furious, too, with the Park Service for insisting that he confine his present efforts to the faces alone. “I know it was their work that stopped all work on the mountain except the heads,” he wrote to Arundel, and added that the Service was engaged in “troublesome sabotage.” Also, the Park Service still was insisting he prepare and submit some sort of organized plans and realistic cost estimates for his work, and he lashed back saying this was an absurd attempt “to apply road-builder practices … or sophomoric engineering to the carving of a great portrait.”