What is the story so I can answer?
Answer:
need to see the graph to answer
I began to conceive hopes of getting my liberty in a short time
The speaker had a specific identity. He was A.H.'s friend and this was the way he mourned him. No one else mourned him with those words. No one else shared the same experiences with A.H. The I may be known to the reader but that doesn't matter. The I is expressing his personal grief in his poems.
Well it really depends.
If you are describing a 12 year old girl, with brown hair and brown eyes it could go something like this:
"The young, twelve year old girl, had long brown curls that fell to her shoulders. Her chocolate brown eyes were as dark as her hair and stood out on her pale, freckled skin. She was - in short - lovely."
If you are describing... let's say... a 16 year old boy with black hair and blue eyes it could go something like this:
"The young man turned his crystal blue eyes in my direction and I looked away quickly so as not to be caught staring. "How old are you?" He asked. "Sixteen," I replied timidly, twirling my long hair around my finger. "Me too," He replied, flicking his shoulder length black hair out of his eyes."