(1) Before the operation of fixing on the book is begun, it will always be found best to mount the embroidered work on a backing of strong fine linen.  The stage at which it is best to add the linen will vary according to the kind of work it is to strengthen.  In the case of canvas it will only be necessary to tack it on quite at the last; with velvet a backing from the first may be used with advantage, all the stitches being taken through both materials.  As to satin, it will be best to do all the very fine work, if any, in coloured silks first, and when the stronger work in cord or braid comes on, the linen may be then added.  The value of the linen is twofold:  it strengthens the entire work and protects the finer material from the paste with which it is ultimately fastened on to the book.

(2) A book must be sewn, the edges cut, and the boards fixed, before the sizes of the sides and back can be accurately measured.  These sizes must be given to the designer most carefully, as a very small difference between the real size and the embroidered size will entirely spoil the finished effect, however fine the details of the workmanship may be.  When the exact size is known the designer will fill the spaces at his disposal according to his taste and skill, making his sketches on paper, and, when these are complete, transferring the outlines to the material on which the work is to be done.  If the designer is also to be the worker it is artistically right, and he, or she, will put in the proper stitches as the work progresses; but if another person is to execute the needlework it will be best that very detailed description of all the threads and stitches that are to be used should be given, as every designer of an embroidery design intends it to be carried out in a particular way, and unless this way is followed, the design does not have full justice done to it.

(3) In the working itself the greatest care must be taken, especially as to two points:  the first and perhaps the more important, because the more difficult to remedy, is that the needlework on the under side of the material must be as small and flat as possible, and all knots, lumps, or irregularities here, if they cannot be avoided or safely cut off, had best be brought to the upper side and worked over.  With satin, especially, attention to this point is most necessary, as unless the plain spaces lie quite flat, which they are very apt not to do, the proper appearance of the finished work is spoiled, and however good it may be in all other points, can never be considered first-rate.

The second pitfall to avoid is any pulling or straining of the material during the operation of embroidering it.  Success in avoiding this depends primarily upon the various threads being drawn at each stitch to the proper tension, so that it may just have the proper pull to keep it in its place and no more—­and although a stitch too loose is bad enough, one too tight is infinitely worse.