I will give a bit more detail about what the emails were referring to specifically: agendas of the committees; discussions between the clerks of the committees and the officials in the departments; appearances of witnesses; answers to questions posed by the committees and potential questions that may be asked; draft opening statements of witnesses; and other related committee business.
Generally, when we analyzed the documents, that's pretty much what they were talking about: appearances, how to prepare for them, and opening statements.