A brief summary….this is a peer reviewed article. It has following sections, Epigraph, Herostone, Prehistoric dolmen.
Hero stone: Sembedu: an unusual hero stone that is seven feet breath-wise. It discovered by Mahendran in the year 2013herostone. He also unravelled the legend of Gundalamma associated with the herostone.
Hero stone of Sembedu
Prehistoric dolmens: in the village of Poongulam on a table mountain. He undertook three expeditions, 2010- 2013, each lasting three days. Fifteen dolmens in good shape were discovered. More than hundred photographs were taken and recorded nearly two hours of video.
Dolmen of Poongulam
Poongulam Northern Hillock
Preparing the e-stampage.
Epigraph: he came across this epigraph in the year 2011. He undertook its study, Interpretation and analysis in 2015-2016. An e-stampage impression was taken. It is about a land grant given by a local chieftain to a nearby temple. The external boundaries of the land is described with land marks in the four directions. It is dated by experts at early 1700 CE.