Old-world charms and multi-cultural delights are discovered in ‘dirty Calcutta’ By Sohini Chattopadhyay | 1 December 2015 The grey, gorgeous sulk of the Kolkata monsoon is best spent in bed, listening to the intense, melodic rain. Another way, equally endorsed, is dreaming with a book and a pot of tea, preferably, with the phone switched off.Home for the rains this time…