Most Nauvoo historians, both Latter-day Saints and others, have largely limited their research to the Mormon era of the 1840s. Even a survey of Nauvoo, conducted as part of the Federal Writers' Project in the 1930s, focused almost exclusively on the city's Mormon past. The one Latter-day Saint writer who looked at post-1840s events concentrated primarily on the Church's return and role in historic preservation within the city. No scholar has undertaken a thorough study of the city's post-Latter-day Saint period. Hence, in the extensive bibliography of publications on Navuoo, there are only two pamphlets that deal with the city's history in its entirety, and then only up to the 1970s.