Complex sentence: At the age of fifteen he was apprenticed to a linendraper in Ludgate Hill, and while there contracted an intimacy with William Oxberry, afterwards a well-known actor, and in conjunction with him appeared in 1802 in amateur theatricals at the Berwick Street private theatre.
Split into simpler sentences: At the age of fifteen, he was apprenticed to a linendraper in Ludgate Hill. Together, they appeared in 1802 in amateur theatricals at the Berwick Street private theatre.