Depending on what it is, errors can be a big problem. In Klier and Mingay's "Quest for Anastasia", they wrote that FS and her brother Felix were 'children of the second marriage, less straighlaced and religious than the children of the first family.' This caused many AA supporters to latch on to this as proof that FS and her sister Gertrude were not maternally related so the DNA from Gertrude's grandson, Maucher, should not have matched and therefore the DNA tests were suspect. However, as it turns out, this was incorrect. All five children did have the same mother, FS being the oldest and Felix second youngest. They were technically all 'children of the second marriage' since the father had been married once before but had no children (his wife died, possibly in childbirth of a stillborn baby) So what may have seemed like a simple error as minor as when the letters were destroyed turned into a big stink when it inaccurately reported the relationship of FS and Gertrude as half sisters. No, I do not accuse the authors of doing this on purpose, somewhere, they must have received info they believed to be correct, but were mistaken. Unfortunately, the incorrect info from "Quest" is repeated almost verbatim by Frances Welch in her "A Romanov Fantasy", using "Quest" as her source. See, if mistakes are not corrected, misinformation can perpetuate forever.