Complex sentence: O'Farrell first repaired the original layout of the settlement around Portsmouth Square and then established Market Street the widest street in town, as an arrow aimed straight at Los Pechos de la Choca, the Breasts of the Maiden, now called Twin Peaks.
Split into simpler sentences: O'Farrell first repaired the original layout of the settlement around Portsmouth Square and then established Market Street as the widest street in town. It was described at the time as an arrow aimed straight at "Los Pechos de la Choca" (the Breasts of the Maiden), now called Twin Peaks.