My God, Zona said, staring up at St. Marks. Who wrote this?
The character, Zona, is, in Gibsons fantasy, within a region of her friends personal consensual cyberspace, staring up at a software representation of St. Marks which is part of a software instantiation of Venice. She means, of course, Who wrote the software. The joke is that she has never been to the real Venice, which may, for that matter, no longer exist in the future of Gibsons novel. But, Zona might just as well, with the same degree of awe, be with us, in the real Venice, which is, clearly, just as much an inscription of shared memory.