placing the top at the side of the drawing surface. Then against
the limb of the "T" Tom laid the base of a right-angled triangle.
Along this edge he drew his perpendicular north-and-south line
in the upper left-hand corner. He crossed this with a shorter
line at right angles, establishing his east-and-west line. Mr.
Thurston, standing at the cub engineer is back, looked on closely.

Tom now settled on his beginning point, and made the dot with
his pencil. From that point he worked rapidly, making all his
measurements and dotting his points. Then he began to draw in.
The chief engineer went back to his table.

After Tom had worked an hour the chief interrupted him.

"Now, Reade, get up and let me sit down there for a little while.
I want to go over your work."

For some minutes Mr. Thurston checked off the lad's work.

"You really know what you are doing, Reade," he said at last.
"Your line measurements are right, and your angles tally faultlessly,
I'm glad I kept you back today. You can help me here even more
than in the field. Tomorrow, however, I shall have to keep Rice
back. He's our ornamental draughtsman, and puts in the fine,
flowery work on our maps. Here's some of his work."

Tom gazed intently at the sheet that Mr. Thurston spread for his
inspection.

"Rice does it well," remarked Reade thoughtfully. "You've one