If something is deleted from the Biography of a profile, it 'is' in the Changes Log, but the Changes Log cannot be searched to find profiles that were loaded with a gedcom or that might have had a source or text that has been deleted.
The S26 entry that you posted is a 'lot' of duplicated 'words'. The 'biography' of that profile has an entry that refers to S26 which would be used in conjunction with that information, ie 3039-DP. In that instance I do not know of a way to find the Ancestral File, when the number is given, so it is probably not worthwhile, but you might be able to find a Family Search Profile that has the information. Of course, reviewing the sources, would be the important part of research if that profile was found.