Quint where to get the collection? (The Witcher 3: Wild Hunt)

Went through all the quests associated with quintom, except to complete the collection of cards
I looked at the map-guide, ran around all the place, no purpose. At the moment the very last person I played - Thaler, who told me about Lambert, though Lambert I won the map long before that. The main plot I'm on the quest where you gather the kids in kaer Morhen to fight with TO