It would be useful to know where this came from, whether it's from court records, or something from the county clerk or magistrate. "Taking up" could mean purchasing or taking possession. A certificate could be simply a legal document stating someone had done something, met an obligation. So, if it's from some county records, a possible reading of this would be that Marshall and Voden had taken into custody several people who were indentured or enslaved and had run away from their masters. They had then handed them over to the local authorities- perhaps a sheriff- who had given them papers showing that they had done so. The syntax in the last sentence is a bit sticky, not clear as to whether Marshall and Voden had captured Arthur the Indian and an Irish runaway servant, or whether Arthur or Wilson had captured the Irishman...but one suspects that it's the former.

As it was not uncommon for masters to offer rewards for escaped indentured servants, apprentices and slaves, the certificates may have been documents Marshall and Voden could to use in later claiming the rewards, so they wouldn't actually have to keep possession of their captives.