Not only does this apply to mountain subjects but to many others alike. What remarkable pictures of the naval battle of Santiago, the chase of the Cristobal Colon, or the gallant rescue of the despairing Spaniards from their burning ships, might have been obtained from the battle-ship New York, with a lens of this description, even at long range! I believe it will be of inestimable value for the purpose of securing views of the batteries and fortifications of an enemy's harbor, which might be done at a safe distance from their guns. [Illustration: Central Rose Window, Cathedral of Florence, from Sidewalk—Telephoto Lens.] While this attachment is of great value in photographing things miles away, it is even more useful in obtaining photographs of choice bits of landscape which are on the opposite side of a river or lake, and are just beyond the working capacity of an ordinary lens. Odd things are always turning up at unexpected moments, and are frequently just out of reach. [Illustration: Mosaic over Central Door, Cathedral of Florence, from side of Baptistery—Telephoto Lens.] A particular instance of this kind is illustrated in the two views made of a stork's nest [p. 457] which I happened to see while sauntering along one of the picturesque old canals near Dordrecht in Holland. Of course the nest was on the wrong side of the canal, and a nearer approach was impossible without a ducking; so one view was made with a twelve-inch lens and then the telephoto was used, although not much was expected, for there was a stiff Holland breeze blowing, which is not conducive to perfect results, and moreover the storks seemed inclined to greater activity than well-behaved birds of this species generally exhibit. The exposure was almost instantaneous and the result a surprise to the operator. [Illustration: The Jungfrau from the Höheweg, Interlaken, Switzerland (sixteen miles distant).] Another example of the curious uses to which this lens may be put is seen in the illustration of the beautiful memorial column at West Point [p. 468]. The general view was taken at a distance of about three hundred feet in the ordinary way and then a telephoto was made of the bronze figure of Victory which surmounts the column. Inaccessible parts of fine architecture offer an endless series of subjects for telephoto work, where remarkable results may be obtained. The cathedral at Milan, since the removal of the buildings which formerly obstructed the view, now appears to great advantage when viewed from the opposite side of the piazza. The two views of this beautiful structure [pp. 458-59] were made from a second story window on the opposite side of the piazza. I chose this point of view because of the enormous dimensions of the building. I first used the ordinary lens, obtaining the general view, and then telephotographed various portions of it.