L. G. C.—It would be a very difficult thing, and almost an impossibility, for a boy to build a boat like the Whitewing.
E. A. A.—Full directions for making a canvas canoe were given in Harper's Young People No. 26, Vol. I.
N. B. A. S.—Perhaps your tardy correspondent is waiting to receive a new supply of the articles he has offered in exchange. We can only advise you to be patient, and if you do not hear from him soon, to write again, requesting the favor of a reply at least, and the return of your own articles, if he can not fulfill his part of the contract. We believe the invention of which you inquire has not been put to any practical use.
Robert.—You can get a very good nickel-case watch at a price varying from $6 to $10.
H. S. P.—The Boys' Illustrated News, London, Eng., is edited by Captain Mayne Reid. A reply to your other question was given in Post-office Box No. 88.