After the first exchange of greetings, they stood and looked at each other curiously. Glen's hair hung on his shoulders, and the braid that bound the brim of his sombrero was worn to a picturesque fringe, matching that of his buckskin shirt. He was broader and browner than ever; and though his face was still smooth and boyish, these last three months had stamped it with a look of resolute energy that Binney noticed at once.

He, too, was brown, though not nearly so tanned as Glen, in spite of the burning suns of the Gila Valley; for his work had kept him under cover as much as Glen's had kept him in the open air. As General Elting's secretary, Binney had spent most of his time in the ambulance, that, fitted up with writing-desk and table, was the chief-engineer's field-office, or in temporary offices established in tents or houses wherever they had halted for more than a day at a time. He had evidently met with barbers along the comparatively well-travelled Gila; while, as compared with Glen's picturesquely ragged costume, his was that of respectable civilization. Although he, too, was the picture of health, his frame lacked the breadth and fulness of Glen's, and it was evident at a glance that, in the matter of physical strength, he was even more greatly the other's inferior than when they left Brimfield.

Glen could not help noting this with a feeling of secret satisfaction; but, as they rode towards camp together, and Binney described his winter's experiences, Glen began to regard him with vastly increased respect. He thought he had studied hard, and done well to master the mysteries of adjusting and running a level, perfecting himself as a rodman, and learning to plot profile; but his knowledge appeared insignificant as compared with that which Binney had picked up and stored away. Not only had he learned to speak Spanish fluently, but he had become enough of a geologist to talk understandingly of coal-seams and ore-beds. He had the whole history of the country through which he had passed, from the date of its Spanish discovery, at his tongue's end. He spoke familiarly of the notable men to whom, at General Elting's dictation, he had written letters, and altogether he appeared to be a self-possessed, well-informed young man of the world.

Poor Glen was beginning to feel very boyish and quite abashed in the presence of so much wisdom, and to wonder if he had not been wasting his opportunities on this trip as he had those of school. His thoughts were inclining towards a decidedly unpleasant turn, when they were suddenly set right again by Binney, who exclaimed, "But, I say, old man, what a fine thing you fellows have done this winter! The general declares that you have made one of the most notable surveys on record; and it's a thing every one of you ought to be proud of. You should have heard him congratulate Mr. Hobart. He asked at once about you, too, and wants to see you as soon as you get in. He seems to take a great interest in you, and has spoken of you several times. I expect, if you choose to keep on in this business, you can always be sure of a job through him. He seems to think it queer that you should be a year older than I am; but I told him it was certainly so, because I knew just when your birthday came."

Glen was on the point of saying that, if Binney knew that, it was more than he did, but something thing kept him silent. He hated to acknowledge that he knew nothing of his real birthday, nor how old he really was, but he wondered if he could truly be a year older than this wise young secretary.

At this point the conversation was interrupted by their arrival at camp, and by General Elting stepping from his tent to give Glen a hearty handshake as he exclaimed,

"My dear boy, I am delighted and thankful to see you again. I tried to persuade our friend Mr. Hobart, when I last saw him at Santa Fé, that, in spite of your performance on that railroad ride you and I took together last summer, you were too young to make the trip I had laid out for him. He said he didn't know anything about your age, but that you were certainly strong and plucky enough for the trip. I made him promise, though, to try and induce you to go back from Isletta; but he doesn't seem to have succeeded."

"No, sir," laughed Glen, "and I'm awfully glad he didn't, for it's been the most glorious kind of a trip, and I have enjoyed every minute of it."

"I am glad, too, now that it is all over; but I must tell you that, if I had not been assured that you were a whole year older than my young secretary here, I should have insisted on your going back, for I considered it too hard and dangerous a trip for a boy so young as I had supposed you to be until then."

Here was another good reason why Glen was glad he had remained silent on the subject of his birthday.