What was the business proposal that Damu Anna received, and why did it cause him turmoil?

According to the narrative in Chapter 25, Damu Anna received a letter from a friend in Mumbai proposing a partnership in a cotton trading business. The friend presented it as a highly profitable and safe venture, promising a net profit of two lakh rupees, which would be split evenly between them for one lakh each. The letter urged a quick decision, stating that the price of cotton would rise instantly and that those who fail to act on such opportunities repent later. As described in Chapter 25, this enticing but significant proposal put Damu Anna's mind into a state of turmoil, as he grappled with whether to take the financial risk.