Both HanJa and HanGul text were traditionally written top-to-bottom and right-to-left on a page or scroll. Books were written in the opposite direction from western books. The back page of a western style book is where the first page of a traditional eastern book would start. Modern Korean writing follows the same text direction as the western world, but genealogical records normally use the traditional eastern text direction.
The spelling of “un-mun,” the classical Korean used mainly by womenfolks up to the 1950’s needs to be studied by those interested in the text direction.