Note that in Relativity it's possible to find a document with a count of only one in the results after running the tally mass operation on the textual near duplicate group field. The reason why is that during an incremental population for the structural analytics set, a new document may have been added that is a near duplicate of, but larger than a previously loaded document. In this case the new document will be marked as the principal document, and the original that it is a near duplicate of will be orphaned.
Don't miss that Excel includes a feature which you can use to make worksheets very hard to find. In Visual Basic, if you go to View . . . Properties Window you will bring up options for each of the worksheets shown in the project list to the left. There is a drop down menu for the Visible field. If the very hidden option is selected . . .
. . . not only will the worksheet not be displayed with the rest of the 'tabs', but it will not be included in the list of worksheets to unhide, when you right click on a worksheet and select 'Unhide'.