that you can get the work through on this division in much less
time than you had supposed."

As he turned around to speak, Tom sat where he could easily see
the colored field map that Harry had just turned in to the chief.

"Hold on, there, Harry," Tom objected.

"You've lined in a pretty high hill on Section Nineteen. You'll
have to cut that down a bit."

"The surveyor's field notes call for that hill," Hazelton retorted.

"But, as it happens," objected Tom, "I'm just working out the
profile drawing of Section Nineteen from Black's notes. See here-----"
Tom rested a pencil point on a portion of the hill depicted on
Hazelton's map. "You've drawn that pretty steep. Now, as you'll
see by Black's notes, the upgrade at that point is only a three
per cent. grade."

"Humph! It's all of an eight per cent. grade," grunted Hazelton.
"See, here are the surveyor's field notes."

"Three per cent. grade," insisted Tom, holding forward Black's
leveling notes.

"There's a difference there, then, that must be reconciled," broke
in Mr. Thurston, rising, a look of annoyance on his face. "We
can't have any such disagreement as that between the field map
and the profile sheet. Let us find out, at once, where the trouble