Complex sentence: On January 22,1877, while in the "Wiley and Toland's Gem Saloon", Merritt Horrell began to goad Higgins, who already was angry due to the acquittal of the brothers.
Split into simpler sentences: On January 22,1877, Merritt Horrell began to goad Higgins while in the "Wiley and Toland's Gem Saloon". Higgins was angry already due to the acquittal of the brothers.