From Wikipedia, the free encyclopedia. Margaret Leisha Kilgallen (October 28, 1967 – June 26, 2001) was a San Francisco Bay Area artist. Though a contemporary artist, her work showed a strong influence from folk art. She was considered a central figure in the Bay Area Mission School art movement. Description above from the Wikipedia article Margaret Kilgallen, licensed under CC-BY-SA, full list of contributors on Wikipedia.​