Geralt discovers the bloody remains of his contact in Velen – Hendrik – at his house in Heatherton. After examining the body a key is found, which leads to the basement in Hendrik‘s house. A wall-mounted candle-holder opens a secret compartment in the basement and Geralt finds a ledger, with hidden messages about Ciri in it. It’s not much, but these at least give him two new leads with which to continue his investigation.
The Witcher 3 Guide 