The first image shows a minor sanhedrin court with two scribes (light blue robes) standing to either side of the judges. I don't know whether they kept their supplies in a desk near their post or perhaps they had a clerk who would bring them more parchment and ink as needed.
|Minor sanhedrin courthouse|
In the next image you can see the same scribes at work in the Chamber of Hewn Stone, recording the proceedings of the great sanhedrin of seventy-one judges.
|Great sanhedrin meeting in the Chamber of Hewn Stone|