Supporting information may be found in the online version of this article.

jrs_4148_sm_fs1.JPGJPEG image314KFig. S1 (Supporting Information). A location map of Bhimbetka downloaded from Google-maps. The site labeled with A is the Bhimbetka rock shelter complex.
jrs_4148_sm_fs2a.jpgJPEG image759KFig. S2 (Supporting Information). (a) Photograph of the main cave (shelter III F-24), open at both ends, at the entrance of the Bhimbetka rock-shelter complex. (b) Photograph of rock-shelter III C-21, where the painted regions are at a height of about 3 m from the ground level.
jrs_4148_sm_fs2b.jpgJPEG image3198KFig. S3 (Supporting Information). Photograph of the portable Raman spectrometer at one of the rock shelters. The probe head is placed on the top of the spectrometer, and the automobile battery is at the back side of the stool.
jrs_4148_sm_fs3.jpgJPEG image1112KFig. S4 (Supporting Information). Raman spectra of extracted pigments in the 2800–3200 cm−1 region using 514 nm excitation using the Renishaw spectrometer.

Please note: Wiley Blackwell is not responsible for the content or functionality of any supporting information supplied by the authors. Any queries (other than missing content) should be directed to the corresponding author for the article.