jenne came up with this crazy idea that they should dig trenches and come up and send boats and take vicksburg from the other side to shock vicksburg when all of a sudden the union troops came in from the side that they didn't expect it. the plan didn't work, but they met during the civil war, they became friends, jenne later was a brilliant engineer, and in that area, you know, you could turn that into something very different. he ultimately became one of the early people to build skyscrapers in chicago. and olmsted went to chicago and came up with a crazy lagoon system. hadn't thought of it, but it's very possible that olmsted inspired by jenne's failed plan to take vicksburg from the other side went to chicago and came up with the lagoon system. works for me. [laughter] so -- >> great talk, really enjoying it. you mentioned the hudson river school several times, and as a painter i'm curious were the specific locations in the park in prospect or in central park that were direct quotations from paintings that are known or a general sense of space and foreground medium and background