Kathakali - Texts
   
 The textual evidence supports the 
  view that numerous regional styles were prevalent in the area, all of which 
  seem to have departed somewhat from the tradition of Bharata. Judging from some 
  of the commentaries on the 'Silappadikaram' and 'Sangitaratnakara', it appears 
  that dramatic forms also had undergone change. These also indicate, that a distinction 
  was maintained between the pure natya forms and the pure dance forms.
The textual evidence supports the 
  view that numerous regional styles were prevalent in the area, all of which 
  seem to have departed somewhat from the tradition of Bharata. Judging from some 
  of the commentaries on the 'Silappadikaram' and 'Sangitaratnakara', it appears 
  that dramatic forms also had undergone change. These also indicate, that a distinction 
  was maintained between the pure natya forms and the pure dance forms.
The most important texts such as 
  'Balarama Bharatam' written by Balarama Varma, the ruler of Travancore (1724-98) 
  and the 'Sangita Saramritam' by Tanjore's Maharashtrian ruler, Tulaja, throw 
  no light on Kathakali technique. They deal only with the great variety of dance 
  patterns and the numerous possible permutations and combinations which could 
  be achieved in a given sequence. Only sub-chapter in Balarama Bharatam mentions 
  various knee positions and leg-extensions comparable to some of the movements 
  employed in Kathakali today. The author gave the sanction of the sastras to 
  movements known in the gymnasiums as Kalaris and the movements which are known 
  to the various Kalis. The text which helps us most in this respect is the 'Hastalakshana 
  Dipika', which departs considerably from both the Natyasastra and the Sangitaratnakara 
  traditions.