This chapter tells the story of how the Catalogue of Native Potato Varieties from Huancavelica, Peru, which broke new ground in the documentation of agricultural biodiversity and traditional knowledge when it was published in 2006, was created. It also relates the views and experiences of the involved farmers as well as those of its other users, looking back on the process, the catalogue itself and some of the results. The catalogue documents 147 potato varieties, along with the related traditional knowledge, and altogether eight different communities were involved in the project. The different aspects of the catalogue are discussed, and lessons learned are presented.