Arthur Coke Burnell, a renowned orientologist, in his 1875 book, "On the Aindra school of Sanskrit grammars" details Aindra School of Grammar. Burnell believed that most non-Pāṇinian systems of Sanskrit grammar were traceable to this school of grammar, believed to be the oldest and reputed to be founded by Indra himself.

Burnell's search for the Aindra school took him to Southern India where he came across the Tamil grammatical work Tolkappiyam.
He also demonstrated that many of the technical terms of the Tolkappiyam and of later Tamil grammars were merely simple translations of Sanskrit terms which he attributes to the Aindra school or the other pre-Pāṇinian texts.