Here is a site that may help with your Colorado ancestor research. The link below will take you to an introductory page explaining the collection. The collection includes papers running form 1859 to 1923 and involves over 600,000 digital images. It is interesting to note that it also includes newspapers published by the 10th Mountain Division during WWII.
You can either browse or search the collection. The appropriate tabs are located at the left on the landing page.
Colorado Historic Newspapers Collection:
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