- Z Process Quick Freezing Collection, 1917/19373
- Z., Nick. Artist file: miscellaneous uncatalogued material1
- Z.T. McBee Correspondence, 1856/18961
- Zachariah Johnston Papers,
1742-1856175
- Zachariah Johnston Papers, 1790/17922
- Zacharias, Athos. Artist file: miscellaneous uncatalogued material1
- Zacharias, Lee. Artist file: miscellaneous uncatalogued material1
- Zachary Lewis Account Book,
1762-1775.1
- Zackquill Morgan Homestead, Correspondence and Petition, 19291
- Zackquill Morgan II Court Records (facsimiles), 1803/18061
- Zackquill Morgan Pension, 18341
- Zadkine, Ossip. Artist file: miscellaneous uncatalogued material1
- Zadock B. Springer Letter,, 18642
- Zadock Walker, Uniontown Merchant, Remittance for Supplies Furnished to Indians, 1816/18261
- Zadora-Gerlof, Andreas von. Artist file: miscellaneous uncatalogued material1