Wiktionary
thereover
adv. Over that.
Usage examples of "thereover".
And Saint Patrick, for the sake of passing thereover, came unto a very great river named Synnia, between Midia and Connactia, which was impassable of all, save only by vessels.
There is talk of a pit dug in his sleeping-chamber and a chair arranged thereover, which, with an appearance of luxurious comfort, lured him to his fate.