What was the business deal proposed to Damu Anna that caused him so much turmoil?

The business proposal that caused Damu Anna's mind to be in turmoil is detailed in Chapter 25. A friend from Mumbai sent him a letter proposing a partnership in the cotton trade. The friend suggested that they buy cotton immediately, as its price was expected to rise instantly. The letter was very persuasive, claiming it was a "clean and safe" business and an opportunity not to be missed. The friend projected a net profit of two lakh rupees from the venture, which they would split equally, each earning one lakh. This prospect of significant financial gain is what put Damu Anna in a state of turmoil.