Revolvers have not yet been, and I fear they never can be, made sufficiently durable to become a useful cavalry appendage. The fact may be concealed, but it is true, nevertheless, that their fragile nature, independently of their great cost, will always confine their use to an exclusive few: indeed, revolving and breech-loading weapons are among the doubtful class of arms, not fully developed as yet, even if they ever can be. The adoption of double carbines will eventually throw all other small arms for cavalry purposes into the back ground; a range of 1,000 yards with a toy 5-1/2 lbs. in weight is one of the greatest wonders of this wonderful age, showing the astonishing change which has been effected in gunnery: for a deadly power now exists in the most Lilliputian toy as well as in the Brobdignagian monster; and that, too, at immense distances. In proof of this, I will just quote a letter from that gallant officer, Lieutenant William A. Kerr, Southern Mahratta Irregular Horse. “_Camp, Bejapore, May 29th, 1858._ “SIR, “I have received the Enfield carbine, and am much pleased with it in every respect. It cannot, I consider, be improved on, and is by far the best weapon for the mounted service I have ever handled. It is but due to you that I should mention, that your work, as put into the carbine, is far beyond what I expected at the money. I hope to be in a position, at no very distant date, to give you a heavy commission, and will certainly recommend you in every way I can. I have knocked over a deer at 400 yards with the carbine, and make very good practice up to 800 yards, by firing with two drachms of fine rifle powder. I have given it, and Prince’s breech-loader, a fair trial; the latter cannot be compared to the former; it has not the same range, power of projection, or of shooting; it moreover fouls in the proportion of at least 3 to 1 more. Had I had such carbines at Kolapore, I would have destroyed the 27th Native Infantry in an hour. “I am, sir, yours, &c., “WILLIAM A. KERR.” The weight of this single carbine is only 5-1/4 lbs., and it is 20 inches in the barrel. The great power of shooting would justify a reduction of length to 15 inches, thus reducing the weight to a little over 4-1/4 lbs.; and yet this carbine would be more certain in its effects at 600 yards, than old Brown Bess at 150. The complaint that carbines are found to be an encumbrance in the service is no longer valid: they may be made to form merely a portion of the saddle with the same facility of handling as a pistol, and with a hundredfold greater accuracy of range. [Illustration: Mr. Greener’s Model Carbine, 22 inches long in the barrel, .577 bore, 5-1/4 lbs. weight.]