Prepare the other two bags in the same way. In picking up each bag from the table, when you are going to do the trick, begin by lifting it about an inch from the table with the left hand; then grasp it round the middle with the right hand and hold the little finger under the bottom of the bag to prevent the blocks of sand from falling away. The paper of which the bags are made should be fairly stiff.
When all the sand from one of the bags has been poured out on to the hand—naturally a good deal of it will fall into the bowl—the conjurer turns his hand over and lets the sand drop into the bowl; at the same time he merely has to take his right little finger away from the bottom of the bag and the blocks fall into the water. They drop behind the falling sand, and being of the same colour they are not noticed by the audience.
If the conjurer does not care for this method of getting the prepared blocks into the water he can have larger bags and have the prepared blocks in them with the sand. In that case he dips his hand into a bag, takes out a handful of sand, and lets it trickle back into the bag. He does this once or twice; then he takes out a handful of sand and lets it fall into the water, taking care to let the audience see that he puts in nothing but sand. He repeats the action. Then, in taking another handful of sand, he gets two or three of the blocks with it, lets some of the sand fall into the water, brings his hand down close to the water, releases the "blocks," brings his hand up again and releases the rest of the sand from it. He can continue in this way until the bag is empty.
If the performer is on a stage there is very little likelihood of the audience seeing the blocks even if they are dropped from a height with the sand, but in a room, with the audience close to the table, it is as well to take every precaution against the discovery of the secret.
As for the rest of the trick, the effect is produced entirely by showmanship. In the hands of a capable performer the trick will cause a sensation, but if it is presented in a slipshod careless way, so that the audience are not thoroughly convinced at each stage of the trick that there has been "no deception," then the trick will go for nothing. For example, if the conjurer neglects to take out a handful of the wet sand and show it to the audience, he misses a point. Of course, all that the conjurer really has to do is to feel in the bowl for the particular blocks of sand he requires. It is as well to have one or two more blocks than are actually necessary. When the conjurer has taken out a handful of the blocks he requires he merely has to crush them in his hand and they fall in a shower of dry sand.
A hint to the drawing-room performer. After the performance see that the water is poured away at once; otherwise, if some of the younger and more inquisitive members of your audience come round behind your screen at the close of the performance they will be sure to want to know how this trick was done, and if they get a glimpse of the water they may possibly notice grease floating on the surface!
Various other methods have been invented for keeping certain portions of sand dry when other sand of similar colour is placed in water. Some conjurers have done the sand up in little packets of grease-proof paper. I have also heard of tiny air balloons being filled with sand. The great drawback of any of these other methods is that when the conjurer is letting the dry sand trickle away from his hand into the goblet he cannot immediately let the audience see that he has nothing concealed in his hand. He has to go at once to the bowl for the next handful and leave the "fake," whatever it may be, in the bottom of the bowl. By using the method I have described the conjurer gets the most convincing effect, and if he prepares a large quantity of the different blocks of sand at the same time the trick is really not troublesome. The exact quantity of tallow required must be determined by experiment; it will depend, of course, on the amount of sand which is being prepared.
The object of using goblets for the display of the dry sands is to enable the members of the audience in the front rows of seats to see the sands. When one is performing to an audience composed chiefly of children the first two or three rows of seats are usually occupied by very small children, and from their positions they cannot see the top of the table. Raise the object which you are going to place on the table and you bring it within the view of everyone.