In Great Expectations, some sort of plan is formulated to get the convict out of England (after he becomes Provis). What are the details of the plan?

Since Provis (Magwitch) will be arrested and executed if he is caught in England (he was forced to emigrate—go into exile—to New South Wales in Australia), Herbert Pocket and Pip plan to smuggle him on board of a ship. They have planned to get a rowboat, which Herbert would row back and forth for several days in a row, so as not to arouse anyone’s suspicions when they help Provis make his escape. In the dark, they manage to get Provis into the boat and out to the ship, but Compeyson (who is on the ship) attacks him, causing them both to fall into the water. This parallels the first introduction of the two convicts when they both escaped from the prison ship and made it to land. In this episode, however, Compeyson drowns and Provis is injured so that he dies in prison with Pip by his side.