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            foreword to the online edition 
            preface 
            I. introductory 
            II. common sharpers and their tricks 
            III. marked cards and the manner of their employment 
            IV. reflectors 
            V. holdouts 
            VI. manipulation 
            VII. collusion and conspiracy 
            VIII. the game of faro 
            IX. prepared cards 
            X. dice 
            XI. high ball poker 
            XII. roulette and allied games 
            XIII. sporting houses 
            XIV. sharps and flats 
            postscript 
              
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            SHARPS AND FLATS 
              
            CHAPTER III 
            MARKED CARDS AND THE MANNER OF THEIR EMPLOYMENT
              
              
             § E -- Shading and tint-marking
            Manufactured cards having fallen into comparative desuetude, the 
              reasonable inference is that they have been supplanted by something 
              better; and such is the fact. In the hands of the best men they 
              have been superseded by genuine cards, marked (generally by the 
              sharp himself) either with 'shading' or 'line-work.'  
            The earliest method of shading, so far as can be ascertained, consisted 
              of the application to plain-backed cards of an even tint which, 
              being rendered more or less deep, denoted the values of certain 
              cards. This tint was produced by rubbing the card with a rag, lightly 
              impregnated with plumbago, until the required depth of tint was 
              obtained. This imperfect method, however, has gradually developed 
              into others which can hardly be said to leave anything to be desired-at 
              least from the sharp's point of view.  
            At the present time shading is principally confined, if not entirely 
              so, to ornamental backs. It is effected by applying a faint wash 
              of color to a fairly large portion of the card. This color of course 
              must be one which approximates to the tint of the card, and further, 
              it must be one which will dry without removing the glaze.  
            Just as there has been continual warfare between the makers of 
              heavy guns and the inventors of armor-plating, so there has been 
              a long struggle between the playing-card manufacturer and the professional 
              gambler. Whilst the latter has been engaged in the endeavor to concoct 
              a stain with which he could shade his cards without spoiling the 
              enamel or altering the color, the former has done his best to circumvent 
              the sharp's endeavors by compounding the glaze of ingredients which 
              will spoil the 'little game.' For some time the manufacturer triumphed, 
              and it became known that Hart's red 'Angel-backs' were unstainable. 
              Alas! however, vice and, shall we say science was victorious, and 
              one can now buy a fluid warranted to stain any card for a mere trifle. 
             
            These fluids are nothing more than solutions in spirit of various 
              aniline dyes. For red, aurosine is used, and for blue aniline blue. 
              Stafford's red ink, diluted with spirit, produces a perfect stain 
              for red cards. Others as good can be made with the 'Diamond' dyes. 
             
            A suitable solution having been obtained, the cards are shaded, 
              either by putting a wash over a certain spot or by washing over 
              the whole of the back with the exception of one spot. The latter 
              method is the better of the two in many respects, as the cards can 
              be distinguished at a distance of two or three yards, and yet will 
              bear the strictest examination, even at the hands of one who understands 
              the former method. In fact, the closer one looks at the cards the 
              less likely one is to discover the mark, or, as the sharp would 
              say, to 'tumble' to the 'fake.'  
            The directions for use issued with the shading fluids will be found 
              on page 302.  
            As the delicate tints of shaded work are lost in reproduction, 
              satisfactory examples cannot be given.  
            On the opposite page, however, will be found an illustration of 
              one method of shading the familiar 'angel-hack' card represented 
              in fig. 11.  
            The shading in fig. It has been considerably exaggerated, to render 
              it apparent.  
            The little 'angel' (a, fig. 11) is made to indicate the value of 
              the cards by shading the head for an ace; the right wing for a king; 
              the left wing for a queen; the right arm for a knave, and so on. 
              The two is not marked.  
               
            FIG. 11 -- Angel-back 
            The suit of the card is denoted by shading various pornons of the 
              foliated design adjacent to the 'angel' (b, fig- 11).  
            
              
            FIG. 12 
            
            With the exception of the exaggerated shading, these marks are facsimiles of those upon a pack purchased from one of the dealers, all of 
              whom supply them. Although the cards can be bought ready shaded, most sharpers prefer to do them for themselves. Therefore, they merely buy 
              the marking- fluids, and invent their own marks.  
              
             
               
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