Joanie Ingraham's posting is correct. If you wish to locate places directly a good site is www.jewishgen.org/shtetlseeker/ . It is especially good for locating small villages not on the available maps. You need an approximate idea where a village might be. A first step is to obtain the coordinates of a nearby larger village or city. Using GPS the site also provides you with a map. German place names have been changed to Polish, but many north Posen locations still retained their Polish name at the time our ancestors left. For example, Kolmar County was still Kr. Chodziesen until the railroad came through. Most Posen ancestors were gone by then. Chrustowo, an ancestry location found on the LDS microfilms, was Chrustowo in the 1830s. You have to pick the right one out of 7 possibilities, obviously the one in the Usch/Chodziesen kirchenkreis.