Dr VM Jayapalan of Bangalore had penned a beautiful composition on Agathiyar and the Siddhas titled AGATHIYAR ARUT KAVASAM made available by Siddha Heartbeat at https://www.scribd.com/doc/282253033/Agathiyar-Arut-Kavasam
The Dr has released the ARUT KAVASAM in audio too, set to music by Subramani and sang by Sandhya.