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Difficult without context, I know, but does anyone have any idea what the speaker means by "este cuaderno lo ando escondido"? I can't really give any context as this has nothing to do with the interview as a whole. When I say interview, I mean interview as part of an investigation.

It's a transcript from an interview and the interviewee is talking about sending some documents to the interviewer/investigator by e-mail if he wishes.

Interviewee: Esto lo voy a adjuntar, verdad? Mire, este cuaderno lo ando escondido. Hay un lápiz, y aquí, entonces, usted quiere...

Interviewer: Las copias de las facturas donde X firmaba.

Interviewee: Bueno, que son todas.

Interviewer: Sí, dame de, una por cada transportista.