Answer: To encourage Frethorne's parents to buy out his servitude.
Explanation:
As an indentured servant, Frethorne was unhappy and couldn't find peace with himself as he was muddled and miserable.
Frethorne laments about his conditions and wrote a letter to his parents about how unhappy he was and that he would like to return to England.
He begged his parents to send anything that could be traded for his relaease even if it was probably beef and cheese. He desperately wanted to leave his unhappy and suffering state.
