In chapters 36 to 48 of Great Expectations, what is the first thing that Pip does with his yearly allowance?

Well, within these chapters the first thing that Pip does with his yearly allowance (since he has turned 21 and now handles his money affairs himself) is to set up a job and partnership for Herbert. Pip goes to Walworth to meet with Wemmick and arranges through Wemmick that Herbert will become the partner of a young merchant in exchange for Pip's giving the merchant 250 pounds and regular payments. It will remain a secret that Pip is the one financing the arrangement.