Henrik Blume wrote in an undated letter to Axel Oxenstierna that 'Adrian Clas-sen from Amsterdam' - had left the country due to the hard times and fierce competition . This letter might date - taken in consideration the monument in Uppsala from 1648 - from the period 1648-1654, the year Oxenstierna passed away, or somewhat earlier, > 1644 when the Ryning mansion was ready.