A volume of three related pamphlets from 1723 in Sion College Library was severely mould damaged and flagged for conservation treatment. They are about the trial of Francis Atterbury, Bishop of Rochester, who was charged with treason for his involvement in a Jacobite plot [Sion Main Quarto D34.1/At8]. The paper lost sizing and fused into a block. Previous attempts to open the book had resulted in numerous tears and losses. In many places the paper was very pulpy and weak. The title page of the first pamphlet was adhered to the inside front cover and the last page was adhered to the inside back cover. The boards of the covers were so degraded that it was crumbling and falling away in chunks.
The covers and pages displayed all the colours and textures of mould I have seen on books across my years as a conservator. It was pink, green, black, and grey. It was powdery, granular and imbedded in the paper fibres. During washing, some of the mould was very slimy and slippery.
Thankfully, the central pages were less severely damaged (i.e. less tears rather than no tears, slightly stronger paper rather than incredibly weak and damaged paper). This shows the protective nature of bindings to the text block. Despite the severe damage, this could, with an intense conservation treatment, be saved.
The covers were removed and the spine was cleaned with xantham gum. The text block was separated along natural breaks into front, middle and back sections. These three sections could then be treated in successive but separate treatments which would help to retain the order of the pages. Due to the damage, it was not possible to check the collation or note any printing errors before treatment, so it was more essential to be diligent about the order of steps undertaken.
The pages were washed in warm water with a small amount of propanol added to aid wetting. A small fan brush, a thin Teflon folder, and fingertips were all that was used to separate the pages. Creating waves of water around the small openings that were initially available allowed the gentle but strong power of water to do much of the work. My fingerprints were the most abrasive tool to interact with the wet pages. In many places the mould was too firmly embedded in the paper and could not be removed without causing damage. Pristine pages were not the end goal. Instead, the intended result was pages that could be turned and a document that could be issued to readers.
After washing, the pages were resized and further treated for mould with a sizing agent in solvent. The methylcellulose size supported the weakened paper fibres and the solvent helped to mitigate any remaining mould spores. Next, the pages were lined with a 5gsm machine-made Japanese tissue adhered with cooked wheat starch paste. The condition of the pages considerably improved after lining. They could now be easily and safely handled. They were arranged into sections and infills applied as needed. Where possible, detached pieces of the original text were repositioned.
With the paper repairs complete, the pages were sewn on linen thread and bound into a pamphlet binding structure devised by the V&A Museum for one of their pamphlet collections. This structure is clean, modern, and non-adhesive. It is slim and lightweight allowing the three pamphlets to be stored in one box which reduces the amount of shelf space needed while still protecting the items. Additionally, this structure more closely resembles the original nature of these items as three related but distinct texts. This item is now safe to handle and can be accessed in the reading room.
Talitha Wachtelborn, Sion College Collection Conservator