By Sarah Moore
I landed in digital collections by pure serendipity. I entered the Public History program with a focus on historic preservation at the University of South Carolina. Receiving no funding from my department, I applied for a position in Digital Collections helping to digitize The Gamecock from the late 1980s to the mid-1990s. Discovering my love for Library Science too late, I continue to work in Digital Collections hoping to build upon my interest in how digital collections can be used for historical preservation. Over the last few months, I have worked on five different projects including digitizing a portion of the John Caldwell Calhoun papers.
In planning for the Teacher Workshops for Social Studies teachers, library organizers selected the John Caldwell Calhoun papers for use in the workshop. A controversial figure of history today, Calhoun was an active proponent of slavery and states’ rights during his political career. A native of South Carolina, Calhoun served in the United States House of Representatives, became the Secretary of War and became the Vice President of United States. Thus, it was easy to see why items from this collection were ideal for a workshop focused on helping social studies teachers utilize digital collections in their classroom.
This collection consists mainly of business and personal correspondence of John C. Calhoun from the South Caroliniana Library, little of which was digitized. For the workshop, a few letters were selected to be digitized. In selecting this letters, however, it was discovered that these letters were silked, in attempt to preserve the letters. Silking was a conservation technique used in the late nineteenth century and the early twentieth centuries. In basic terms, this process consisted of adhering a thin piece of transparent silk to a document. The reasoning behind this process was to slow down the deterioration process of the paper (Barrow, 1942; McCarthy, 2016).
In digitizing the Calhoun papers for the Teacher’s Workshop, my initial thoughts were on time management for the project, in order to ensure that everything was accessible and usable for the workshop. Thus, my focus was on the project flow of this endeavor, scanning all the items and ensuring clear images, that any questions about the metadata edited, and everything loaded on the library depository, well before the deadline. Although it was interesting to see and work with letters that went through this early method of preservation, the fact that items in this collection were silked was not a part of my initial focus.
I started by scanning letters from the Calhoun collection on the Zeutschel, a large flat base scanner in the Digital Collections office. In looking at the first images of the scanned letters, I noted problems in seeing the handwriting in the images. Since the letters were going to be used in a workshop, and the fact that handwriting from the nineteenth century materials are in themselves hard to read, the clearest images were needed. Thus, I sought advice on getting more clear images. The library consulted a conservator to see what could be done about the silked documents while in the office, basic research was conducted into experiences from other libraries and archives in using silked materials.
One unexpected outcome of silked archival items it that the items become harder to read over time. The aluminum in the paste affected the acidity of the paper, resulting in ink dissolving and discoloration of the paper overall. It is possible that this what led to the discoloration in the documents. Further research also revealed that this process often used arsenic. While there was no evidence that these materials contained arsenic, I took precautions and wore gloves when handling the Calhoun papers (Information Resource Management Association, 2019; McCarthy, 2016).
While the problem with clarity of some of the images remained, I continued to scan the letters and began to create metadata in hopes some of the images could still be used in the Teachers Workshop. The last step was to add the images and metadata in to the library’s digital depository known as CONTENTdm, so the images would be accessible online through the Library’s website. Some of the more legible images were used in the teacher’s workshop. The fully digitized John Caldwell Calhoun collection can be found here: http://digital.library.sc.edu/collections/john-c-calhoun-papers/
Barrow, W. J. Restoration Methods. (1942) The American Archivist. Page 152 Retrieved from http://www.americanarchivist.org/doi/pdf/10.17723/aarc.6.3.497248722g4584rr?code=SAME-site.
Information Resource Management Association USA. (2019). Digital Curation: Breakthrough in Research and Practice. Retrieved from https://books.google.com/books?id=lcxjDwAAQBAJ&pg=PA200&lpg=PA200&dq=arsenic+in+silking+archival+materials&source=bl&ots=ymV2dnhioj&sig=nzhC0NeX3EpyvjEGAzeaKA2nyAU&hl=en&sa=X&ved=2ahUKEwiwv5jFv-rdAhWC21MKHcwZDfAQ6AEwCXoECAIQAQ#v=onepage&q=arsenic%20in%20silking%20archival%20materials&f=false.
McCarthy, C. of YUL Conservation and Exhibition Services, Preservation Department, Yale University. (2016 October 11). “Arsenic and Old Paste: Using XRF to Assess Silked Documents” [Blog Post]. Retrieved from https://yulconservationandexhibitservices.wordpress.com/2016/10/.