The Journal of San Diego History Winter 1981, Volume 27, Number 1 Thomas L. Scharf, Managing Editor Original Articles: U.S. Grant, Jr. A Builder of San Diego. By Evelyn I. Banning. Lydia Knapp Horton: A "Liberated" Woman in Early San Diego. By Elizabeth C. MacPhail. Mud Volcanoes, Faults and Earthquakes of the Colorado Delta Before the Twentieth Century. By Carl L. Strand. Book Reviews: Land in California. By W. W. Robinson. Reviewed by Harry C. McDean. Comparative Frontiers: A Proposal for Studying the American West. By Jerome O. Steffen. Reviewed by Newell G. Bringhurst. Photographing the Frontier. By Dorothy and Thomas Hoobler. Reviewed by Ronald J. Quinn. Reclaiming the American West: An Historiography and Guide. By Lawrence B. Lee. Reviewed by Judith Austin. Imperial San Francisco: Politics and Planning in an American City, 1897-1906. By Judd Kahn. Reviewed by William A. Bullough. Book Notes: Missions. By Stanley Truman and W. Michael Mathes. The Natural World of the California Indians. By Robert F. Heizer and Albert B. Elsasser. Kit Carson's Long Walk and Other True Tales of Old San Diego. By Henry Schwartz. Guide to American Historical Manuscripts in the Huntington Library.   The Mission by the Sea: A Documentary History of San Buenaventura Mission. Compiled and edited by Msgr. Francis J. Weber. Views of Los Angeles. Text and contemporary photographs by Gernot Kuehn. A Companion to California. By James D. Hart.