Only problem is this is UNTRUE !! THERE IS NO LINE THAT TOUCHES THE SOUTH EAST CORNER OF ALL THREE CORNERS , well that is straight lines. If we bend one or maybe curve one it might work. Here is a Cad drawing given to me some time ago. It is extremely accurate and based on Petrie's measurements. The line does not exist. It is as false and as error prone as most of Scott's other drawings and most of Lehner's other measurements.