The length and caliber of the line should be determined by the character of the fishing—always bearing in mind the fact that the line must of necessity be suited to the rod, a matter wherein the beginner is prone to go wrong and concerning which he is apt to receive some very bad advice from the man who angles chiefly in streams of printer's ink. From the time when the memory of man runneth not to the contrary the "gossamer line" of the trout fly-fisherman has been a favorite topic of the producer of the "speckled-beauty" style of literature—the practical fly-fisherman knows that there is nothing more absolutely futile than the attempt to cast a line which in effect is without weight.

Very little thought will convince the reader that only a line which indeed has weight will carry well through the air when cast, and that a very small caliber line simply will not do. I shall not trouble to enlarge upon the matter. Concisely, for the average fly-rod of nine to ten feet the line should be of size F or E, the latter for the nine and a half or ten-foot rod. For the rod somewhat above the average in weight, length or casting power size D may perhaps be best suited. Unless, however, the line is thoroughly adapted in weight to the rod upon which it is used, satisfactory casting will be quite impossible.

In the matter of suiting the line to the rod, remember that a line which is too light will fail to bring out the action of the rod and cannot successfully be employed. On the other hand, if the line is too heavy, the overburdened rod cannot lift it quickly and neatly from the water; if the angler wishes to make a somewhat longer cast than usual he may smash his rod in the endeavor to perform the impossible. The casting power of a rod is not determined purely by its weight or length; wherefore, if the opportunity offers, it is well to fit the line to the rod by practical experiment.

That a tapered line is most efficient and satisfactory for dry-fly casting is generally conceded. By the employment of a line of this character, the line being gradually fined down toward the ends, the caster has all the advantage of a heavy line in casting, while at the same time the line may be cast delicately and lightly. Also a tapered line, exactly suited to the rod upon which it is used, may be cast farther and more accurately than a level line. The majority of American fly-casters undoubtedly fish downstream and use the level line; when dry fly-fishing, however, it is imperative that the angler fish or cast upstream and by all odds the better plan to employ the tapered line.

For ordinary work select a double-tapered line, both ends graduated, of thirty yards' length. The length of the taper varies from fifteen (occasionally less) to eighteen feet. As to the proper length of taper, that again, other things being equal, depends somewhat upon the nature of the fishing for which the line will be used. If rather short casts are to be a rule, a short taper will work best for the reason that more of the "swell" of the line will be in use and not merely wound upon the reel. A short taper also works best against the wind for the same reason.

It should be obvious, although the fact has not been adequately emphasized by angling writers, that if the caster can as a rule (owing to the restricted nature of the stream, which may be small and with banks thickly wooded) use only the light tapered end of his line on a rod really adapted to the size of the swell of the line, he is working at a great disadvantage. For average small-stream fly casting it is best to select a line having a "quick" taper, fifteen feet or less.

The leaders furnished by the tackle dealers especially for dry-fly fishing are usually of very good quality—the best is none too good—with dropper loops, of course, and from six to nine feet in length. The angler who elects to tie his own leaders, a very simple matter and by far the better plan, should purchase the very best silk-worm gut for the purpose—round, hard and clear. It will be necessary to have gut of different weights or caliber from heavy to very fine, in order that the leader may be tapered from about the size of the end of the reel line to very fine undrawn gut nearest the fly. Drawn gut was at one time extensively used by dry-fly fishermen, but it is now generally recognized that fine undrawn gut is quite as efficient and the additional strength gained by its use is a distinct advantage.

The tapered leader certainly aids materially in fine work over clear, still water and shy fish. I believe it was Henry P. Wells, the author of "Fly-Rods and Fly Tackle," a work familiar to both American and English fly fishermen, who stated that in his opinion the most important factor for successful fly fishing was to make invisible any connection between the fly and the line, and the use of fine terminal tackle tends to bring this about. Moreover, fine caliber gut near the fly assists in floating it. Better, straighter casting can be done when a tapered leader is used.

The proper length of leader varies with the immediate angling conditions. Under no circumstances, for practical fishing, should the leader exceed the rod in length—this entirely in the opinion of the writer, although concurred in by many other anglers. Under rough weather conditions a short leader works best. For long, fine casting a nine-foot leader should be used. For average dry-fly fishing on the general run of American trout streams, I believe a seven-foot leader to be the most practical and efficient.