Conversation so far:
Who were Emily Dickinson's early influences?
Newton was a formative influence and would become the second in a series of older men (after Humphrey) that Dickinson referred to, variously, as her tutor, preceptor or master.
How old was she when she started to write?
CANNOTANSWER.

Question: What were some of her early writings?
Self-contained rewrite: What were some of Emily Dickinson's early writings?