Mention should also be made, in this connection, of a curious system of alphabetic numerals that sprang up in southern India. In this we have the numerals represented by the letters as given in the following table: 1 2 3 4 5 6 7 8 9 0 k kh g gh [.n] c ch j jh n [t.] [t.]h [d.] [d.]h [n.] t th d th n p ph b bh m y r l v ['s] [s.] s h l {40} By this plan a numeral might be represented by any one of several letters, as shown in the preceding table, and thus it could the more easily be formed into a word for mnemonic purposes. For example, the word 2 3 1 5 6 5 1 _kha_ _gont_ _yan_ _me_ _[s.]a_ _m[=a]_ _pa_ has the value 1,565,132, reading from right to left.[138] This, the oldest specimen (1184 A.D.) known of this notation, is given in a commentary on the Rigveda, representing the number of days that had elapsed from the beginning of the Kaliyuga. Burnell[139] states that this system is even yet in use for remembering rules to calculate horoscopes, and for astronomical tables. A second system of this kind is still used in the pagination of manuscripts in Ceylon, Siam, and Burma, having also had its rise in southern India. In this the thirty-four consonants when followed by _a_ (as _ka_ ... _la_) designate the numbers 1-34; by _[=a]_ (as _k[=a]_ ... _l[=a]_), those from 35 to 68; by _i_ (_ki_ ... _li_), those from 69 to 102, inclusive; and so on.[140]