Looking for a set of sites that I bookmarked about two weeks ago, only to find that they are not included in my bookmarks (or recently bookmarked). So, I tried looking at my history to find the sites manually. However, there is history for today (Dec. 11) and history for November, but nothing in between! Also, the history for November ends at Nov. 19, even though I spent an enormous amount of time during the weekend of Nov. 24, 25 26 on the web. I have not cleared my history. Everything is saved. I'm choosing the option to show all history, and yet there is this enormous gap. (History for November through Nov. 19, as well as October, September, August and older is displayed.) What is the reason for a chunk of history to be missing? How do I get it back?