Supplies for erasing pencil lines on the pages of the handwritten bible as was mentioned in the Metroland article:
“It’s just a ratty pencil case filled with erasers and pens. But each thing in there means something..."
It's also on display until July 23, 2010 at The Paper Sparrow in Troy, New York. You can see fingerprint impressions on the erasers when you look closely at the print. (Thank you to Kate for pointing this out!)