Complex sentence: From 1838 to 1840, he attended The Reverend Cole's private boarding school in Highbury, where he was bullied by a boy who would force Collins to tell him a story before allowing him to go to sleep.
Split into simpler sentences: From 1838 to 1840 he attended The Reverend Cole's private boarding school in Highbury. At this school he was bullied by a boy who would force Collins to tell him a story before allowing him to go to sleep.