'Oxford Book s' have publishe the works of K.A.NILAKANTASHASTRY' on variously on Southindian History. They hav an office with showroom on Mount Road near Gemini fly over, adjascen to American consolate.
British cuouncil Library, behind LLA buildind have the volume on Southindian history in , available for lending'
KK Pillai has written a book on " Inia and Sri laanka" published by Universsity of Madras in 2001. This may give you information abot Pandiyas interacttion with lankans. I could lend you my copy, Contacct 044-264449397.
Pillai has given reference of the book, 'PANDIYA ' 1929 by M/S Lussac. A copy of this may be avaailabble with Maadras Universssity Libraary.