Undoubtedly this newcomer was accustomed to judging men quickly after seeing them.
"These boy engineers!" chucked Duff.

"Humph!" "Humph!" agreed the stranger.
At this moment two bronzed-looking, erect young men came tramping down the sidewalk together.

Each looked the picture of health, of courage, of decision.

Both wore the serviceable khaki now so common in surveying camps in warm climates.

Below the knee the trousers were confined by leggings.