Investigation
Some questions are too complex to answer immediately with a single gather information roll. For instance, you might want to discover the network of contraband smuggling routes that the Hive uses throughout Duskwall. In these cases, the GM will tell you to start a long-term project that you work on during downtime.
You track the investigation project using a progress clock. Once the clock is filled, you have the evidence you need to ask several questions about the subject of your investigation as if you had great effect.