The Kalamukhas hold that the following are the means for attainment of desires concerning this world and the next: 1. eating food in skull;2.besmearing the body with the ashes of a dead body; 3.eating the ashes 4.holding a club 5.keeping a pot of wine 6.worshipping the Mahavirathis. THE KALAMUKHAS WERE WIDESPREAD IN SOUTH INDIA in the NINTH, TENTH & ELEVENTH CENTURIES ... At Melpadi, there was Mutt of Kalamukahs - who was called Lakuleesa Panditha .. There was another Thiruvottiyur who was called Caturananapanditha. (Unquote)
Sethuraman & Kudavoil have mentioned that in early ages, this was practised in certain temples including Mylapore.
There is no inscriptional evidence in Mylpore Kapaleeswar temple to support this theory. But the temple was not the one which existed in those days. Hence the theory supported by other relevant inscriptions were put forward by Dr.Sethuraman & Kudavoil.
The irukkuvelir community of kodumbalur were ardent followers of kaalamukha since day one. They should have been instrumental in bringing this influence upon cholas - who did not evince any special interest in kaalamukha in early days.
The most famous among kodumbalur clan - Bhoothi vikrama kesari supported a kaalamukha mutt in madurai - it was called mallukarjuna madam - named after a saint who lived in that period. We have inscriptions in moovar koil that talk about this.