The Importance of Jury Notes in Drug Trials

The jury was driven to the courthouse every day by a bus that picked them up in a secret parking lot. They were sequestered for that week, but I'm pretty sure they went back and forth across that bridge every night. Were there any jury notes that were of note during their deliberations? "I think it was eight days of silent jury deliberations until the very end when the jury foreman sent out a note"