Complex sentence: Peddling his pen-and-ink sketches he sold his first work in 1886 to John Ames Mitchell's "Life" magazine, his works appeared weekly in the magazine for over thirty years.
Split into simpler sentences: Peddling his pen-and-ink sketches he sold his first work in 1886 to John Ames Mitchell's "Life" magazine. His works appeared weekly in the magazine for over thirty years.