Ice-Cream Cones or Eyes?

One way in which ownership of manuscripts can be attributed Christ Church, Canterbury, is by the presence of some distinctive marginal markings:

This image comes from a description in a Sotheby's catalogue, 24 June 1980, lot 68, which Chrisopher de Hamel describes as

"three types of marginal markings: a hand with a triangular cuff and long pointing finger, a group of 4 dots arranged in a saltire pattern, and (most distinctive of all) a mark like a sideways icecream cone"