Complex sentence: Leslie began contributing poetry to the Song Fishermen broadsheets, and soon in other small Halifax literary publicatons, and by the end of the decade he had published poems in "Literary Digest" and "Scribner's".
Split into simpler sentences: Leslie began contributing poetry to the Song Fishermen broadsheets, and soon in other small Halifax literary publicatons too. By the end of the decade he had published poems in "Literary Digest" and "Scribner's".