Complex sentence: He entered local politics and served as chairman of the municipal council from when it was first declared in 1871, then in 1891 Muir was elected Mayor of Albany but retired at the end of his year's term due to ill health.
Split into simpler sentences: He entered local politics and served as chairman of the municipal council from when it was first declared in 1871. In 1891 Muir was elected Mayor of Albany but retired at the end of his year's term due to ill health.