What did Phatik and his friends do to Makhan?

Phatik and his friends get themselves into a bit of mischief when they decide to roll a log away down to the river. The log was intended to be used for making a mast. Unfortunately, Makhan tries to intervene and stop them by climbing on the log. Undeterred, they roll the log away anyway, causing Makhan to tumble into the mud.

Why did pathik go to Calcutta?