Yeah, no. Bob was not buying Berg's pathetic explanation for why she had to attend classes before taking NEWTs. If the Ministry was really that anal about peoples' credentials, they should be firing at least a quarter of those currently working at there, since most entry-level positions were being filled by teens and twenty-somethings who never had a chance to finish school, if they'd ever even been enrolled in the first place. Clearly time for Bob to reassess his earlier analysis of Berg's trustworthiness.
Since Beckett was making no further attempts to escape or aggravate the situation, Bob felt it acceptable to cancel the silencing charm on him. Only fair to let the man defend himself since Breg'd had a chance to do the same.
Not that Beckett's excuses sound any better than Berg's, of course. "Still not something you should have taken upon yourself to have done without first running it by someone familiar with all the ins and outs of your particular situation. You and I will talk about this later. Or now, if that's convenient to you?" Rubbing his face, Bob gathered up the (woefully inadequate) notes he'd inherited from Ross on where the introductory year Ancient Runes classes were at, plus his copy of Ancient Runes for Dummies, and handed them to Berg.
"Miss Berg, if you could find the time to bookmark the relevant sections and draw up an outline of what this week's third and fourth year classes should cover, I'd really appreciate it." If he could get Berg out of the way, maybe Bob would be able to get Beckett to open up about the tattoo some more. Or at least find out if there was any of the ink used in the damned thing left for Bob to test for possible unsavory side-effects.