Complex sentence: Towards the end of the 18th century it was developed as a residential suburb of Manchester and in the extreme north of the township a number of cotton mills were established: in 1820 the parish church of All Saints was built.
Split into simpler sentences: Towards the end of the 18th century it developed as a residential suburb of Manchester and in the extreme north of the township a number of cotton mills were established. In 1820 the parish church of All Saints was built.