Last year I visited gallery of Harappan Civilization at the National Museum, New Delhi. Among the artifacts, I saw a small 'chillum' (hand-held twin pipe) similar to that 'sadhus' (wandering Hindu monks) use in smoking 'charas' (hand-made hashish) and 'ganja' (marijuana). Discussing the history of cannabis, the Wikipedia quotes that charred cannabis seeds were found in a 3rd millenium BC grave in Romania. Submitted with illustration by Vasant Dave