Included in the collection are copies of three of Killough's published articles; her correspondence with individuals in Germany, Norway, Suriname, the UK, Pennsylvania, and Wisconsin; and annotated research materials, the bulk of which document Tank's years in Suriname. Additionally, there are newsletters from Heritage Hill State Park in Green Bay, the site of the Tank Cottage; Tank's correspondence with family members, his citizenship papers, and other official documents such as warrants of attorney; many of these documents are in German, Dutch, or Norwegian with some translations by Killough. Images of Tank's gravesite and residence in Bethlehem, Pennsylvania, as well as renderings of the Tank Cottage in Green Bay are also included.
