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§§ 7-9 1
सटीको वृत्तजातिसमुच्चयः
xi
of the intervening squares, write out the figure which is obtained by adding together the figures in the two squares just above it in the upper line. The squares in the lower lines are to be so placed as to be midway between the two squares in the upper line. See p. 85 below. The resulting figures in the different lines will be the Suci Prastāras for the different metres containing from 1 to 26 letters as said above. The lines will of course be 26, each representing the Suci of metres containing from 1 to 26 letters in each of their four lines (vv. 10-12).
9. The third or the Patākā Prastāra is intended for showing the structure of all the different permutations of a metre. It is to be arranged in as many vertical lines as there are letters in the Pada of a given metre. Thus there will be three vertical lines for a metre with three letters in a Pada. In the first of these lines long and short letters should be arranged in succession one after the other. The total number of these letters is to be determined in the following way :-In the case of a metre having only 1 letter in its Pāda, it will be 2. Now this number should be continuously doubled for each additional letter in a Pāda. Thus for a metre with 2 letters in a Pāda it will be 4; for a metre with 3 letters in a Päda it will be 8; for a metre with 4 letters in a Päda it will be 16; and so on. The number of short and long letters following each other in succession is thus fixed for the first line. The same number of letters shall be contained in each of the other vertical lines; but the manner in which short and long letters follow each other differs, the rule being that the number of long letters in succession followed by an equal number of short letters in succession for each succeeding line is double the number of those in each previous line. Thus in the first vertical line in the case of a metre with three letters in a Pāda one long letter shall be followed by one short letter; in the second vertical line there will be two long letters followed by two short letters in succession. In the third line, there will be four long letters followed by four short letters in succession. The same process is to be followed for metres with four or more letters in their Pādas, the number of vertical lines in each case being determined by the number of letters in a Pāda as said above. For a metre with 4 letters in each of its Pādas, there will thus be 4 vertical lines and each line shall contain long and short letters in succession as indicated above, the last line containing 8 long letters followed by 8 short letters in succession. We have to remember, of course, that the number of letters in each of the vertical lines for a particular metre is the same; only the manner of the alternation of long and short letters differs. Thus in the case of a metre with 4 letters, each vertical line
