The main consideration will be the manner of getting a proper attachment of parts that cannot be wedged or forced together at once, in fact, to get a good purchase or leverage. This must be either obtained indirectly or dispensed with altogether. For the former, building up or "making," as it is termed, must be resorted to, and which may include temporarily glueing fresh wood on to the old parts to be separated or cut away afterwards. Many inexperienced repairers are too apt to look upon all glueing as for permanency, but practice should soon make it plain that all joinings are effected only for such length of time as may be desirable. In making or building up a part from which we can obtain a stand or commanding point from which to get a more direct purchase, it may be necessary to glue one or more pieces of wood, cut to a proper shape and stuck with a dab of thick glue and left until dry. For this purpose the soft white wood or poplar referred to at the beginning will be found useful, it is so easily cut with a chisel or knife keen edged--this condition is an essential at all times. By the bye, some readers may be thinking of the best means of getting a nice clean edge to their knife or chisel. There are several kinds of oilstone or hone in repute for giving a finishing or sharp cutting edge, England, America and the European continent supplying them, the "Chalney Forest" being the commonest known in England; the American "Arkansas" or "Washita" are expensive when very good, but there is nothing that can beat a well selected piece of "Turkey stone" with a nice even surface to begin with. For obtaining a clean cutting edge, a few drops of oil before rubbing will be sufficient. Olive or good mineral oil will do, the latter preferably as it gradually evaporates; whereas vegetable oils acquire a siccative property from contact with the minute particles of steel; the stone then gets clogged and unworkable till thoroughly cleansed. Mineral oil disappearing gradually leaves but little residue, which can be now and again wiped off. In cases where the utmost delicacy of surface cutting or close fitting is required, and where no other tool but the chisel can be used, it may be as well to have at hand a stout, smooth leather strap fixed at each end over a piece of wood about twelve inches in length. The residue on the Turkey stone can be taken off with a knife--care being taken that no dust or grit is with it--and smeared on the strap with a little olive oil. The chisel or knife used briskly and gently on this will after a few passes become as near perfection of keenness as possible. After getting everything in readiness, which will include the carving to shape, of any wood that is to act as a support or fulcrum, these parts must be made to fit as accurately as possible, and may not require glueing but at one or two places and those selected to come in contact with those of the original structure least liable to be affected or damaged. Thus the interior of the peg-box will be found a convenient position from which to build a support that shall reach up underneath the volute or under turn of the scroll. Having well tried the parts as to the fitting, the support or prop may be secured or glued in roughly to the lower surface of the peg-box--presuming of course that the pegs have all been removed--and left to dry hard. When so the parts had better be tried for fitting again, and if any little inaccuracy shows itself, or the pressure in glueing the fracture is likely to be uneven and the junction be untrue, a little paper or card may be inserted or even glued in between, or where judgment may dictate, to enable a good distribution of the balance of pressure necessary. There can be no certain description given of the size or form of the supports or made up parts to be temporarily fixed; all must depend upon the estimation of what is best to be done under the circumstances; it can be likened to engineering on a minute scale, quite as interesting, but less dangerous, while more comfortably conducted in your own home without exposure to the baleful influence of unsympathetic elements.