What was the business proposition that put Damu Anna's mind in a turmoil?

Damu Anna received a letter from a friend in Mumbai proposing a speculative business venture in the cotton trade. According to the account in Chapter 25, the friend suggested they could make a net profit of two lakh rupees, which they would split evenly, each earning a lakh. The friend urged for a quick reply, describing the business as both "clean and safe." He pressed Damu Anna not to let the opportunity pass, warning that the cotton price was expected to rise instantly and that those who fail to act on such deals often repent later. This promising yet risky proposal caused Damu Anna's mind to be in a state of turmoil.