a full six months to complete. But for some reason, when I tried to convert them to orthographic projections I ran into trouble. When I forced myself to Miami Dolphins visualize a perspective drawing of the quarry interior, landslides and cave-ins took place in my head. Doubtless there were flaws in my surveying techniques and drawing ability. But a bigger source of the Houston Texans problem, I believed, lay in the slipshod, hit-or-miss operations of the stone-quarrying authorities themselves, or their workmen. No straight line was in fact straight, no right angle was in fact ninety degrees. Errors accumulated little by


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