Complex sentence: For a short time subsequently he held a post in the Glasgow Athenæum, but relapsed into peddling, he printed in Glasgow a second book with an ambitious dedication, but received scanty encouragement either from his patron or from the public.
Split into simpler sentences: For a short time subsequently he held a post in the Glasgow Athenæum, but relapsed into peddling. He printed in Glasgow a second book with an ambitious dedication, but received scanty encouragement either from his patron or from the public.