When he had thus passed the end of the pond Reade took another course at exactly right angles to the northerly course, but now going westerly.

This he extended until it passed the pond by a few feet.

Once more Reade laid out a course, southerly, at exact right angles with the westerly course, the southerly line being exactly four chains in length, as the northerly line had been.
Now, the young engineer was able to resume his surveying toward the seventh stake.

The extra route that he had followed made three sides of a square.

Tom was now in line again, with the pond passed, and the exact distance between the sixth and seventh stakes.
"I guess that was where Rutter was sure he'd have me," chuckled Tom quietly.