Could you detail the business proposal Damu Anna received from his friend in Mumbai?

As recounted in Chapter 25, Damu Anna received a letter from a friend in Mumbai regarding a potentially lucrative business venture. The proposal was to trade in cotton, with the friend asserting that the price would rise instantly. The deal promised a net profit of two lakh rupees, which would be split evenly between them, giving each partner a profit of one lakh. The friend urged Damu Anna to be 'smart' and reply quickly, describing the business as 'clean and safe' and warning that failing to seize such an opportunity leads to later repentance. This proposal caused Damu Anna's mind to be in a state of turmoil.