Red Dead Redemption

Right this is getting on my wick. Ive been Jack for quite a while now & done a good few missions with him. The Mexican hooker is dead & ive cleared so may places of bandits & ne'er do wells that im getting fed up. Does a prompt appear to tell you where to go to finish this or what? I dont want to be riding round the whole lands over & over. This has been well over an hour at this stage. Ive also sorted the english guy out with the opium etc etc.