Complex sentence: Rainsborowe protested against this by signing "A Remonstrance and Protestation of the Well-Affected People," and he tried to sell the arms he had purchased for his militia.
Split into simpler sentences: Rainsborowe protested against this by signing "A Remonstrance and Protestation of the Well-Affected People,". Rainsborowe tried to sell the arms he had purchased for his militia.