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In the 17th century, written news were distributed mostly in the form of pamphlets, simple sheets of papers containing only information about one subject matter. They could also contain a woodcut drawing, or a song sheet.
The British civil war is known for its polemics brought to the people in the pamphlet wars. There are several large collections available. One of the largest is the Thomason Tracts, available at the British Library. For others, see for example this overview by the Newbury library. A quick search found this collection online: