Complex sentence: In December 1909, Harding started a weekly publication called Camp and Trail, which was incorporated into the "Hunter-Trader-Trapper" by August 1913, broadening the focus of the magazine to include these recreational activities.
Split into simpler sentences: In December 1909, Harding started a weekly publication called Camp and Trail, which was incorporated into the "Hunter-Trader-Trapper" by August 1913. The addition broadened the focus of the magazine to include these recreational activities.