This week, a call went out from the provincial library of Fryslân, Tresoar, announcing the start of a ‘cold case’ program. Selected pieces from the archives are to be shared with the public, to see if they can shed more light on some unsolved mysteries. The first one is a manuscript from the 17th century, and it’s a corker! The manuscript is thought to be a letter, as it is only a single page and appears to be signed in some way, so I will refer to it as the Sminia Letter, for that’s the Frisian family out of whose archives the piece comes. The letter is written in a hitherto unknown script, and as such the language of the letter is unknown as well.