The affix ṭhañ comes in the sense of 'collection thereof' after the word kedāra and also after the word kavacina ,
Thus कावचिकम् 6.4.144; and कैदारिकम्. We read the anuvritti of केदार in this Sutra, by virtue of the word च,
ठञ् कवचिनश् च
Adhyāya 4 · Pāda 2 · Rule 41