I got a very interesting mail from Yrsa Lindquist who wrote a book about food culture on the Finnish coastal areas in 2009. The book has a wonderful picture of a viili-cupboard – purely for making and storing the viili (or fil as it is called in Swedish). Yrsa comes from the same place as the founder of the dairy producer Ingman (nowadays Arla Ingman). She tells the story of how the founder himself, Hjalmar Ingman, rowed to Helsingfors with his viili.
Here are some scanned pages from Yrsa’s book, in Swedish. Thank you Yrsa!