BOOKS
History of the City of Madras by Srinivasachari, C.S. https://archive.org/details/in.ernet.dli.2015.57371
Madras Discovered by Muthiah.S https://archive.org/details/madrasdiscovered00muth
Early History of the Madras Region by Raman, K.V. https://archive.org/details/EarlyHistoryOfTheMadrasRegion
YOUTUBE