Complex sentence: In June 1890 Gould left Britain to complete a works contract in the West Indies, but returned to Newport in time for the 1891--92 season, during which the club didn't lose a match, now known as the team's "invincible" season.
Split into simpler sentences: In June 1890 Gould left Britain to complete a works contract in the West Indies, but returned to Newport in time for the 1891--92 season. During that season the club didn't lose a match, now known as the team's "invincible" season.