The Parcel Locator helps you find Parcels. I know it's in the "Hunt for Sir Richard", but where, exactly? --- "One on-topic sentence in an otherwise off-topic topic with an off-topic title does not make an off-topic topic on-topic. " -Some Mod/Admin
You have to get the parcel from that level and then buy it in the library and then turn it on in the Extras menu. As for where to find it, I'm pretty sure I remember, but without looking... In the first section where the foot bridge is out, you will see that there is a lego grate blocking the waterway to the north. Find the switch that opens that and then swim up there and you will find it.