The streak of blood she had painted earlier was gone now, erased with sweat and friction.
Hartz' earlier painted portraits, landscapes and still lifes were characterised by thick layers of paint.
Dendrocronological analysis, however has now proven conclusively that it cannot have been painted earlier than 1550.
Only four main icons were painted earlier, in 1746, and present the work of unknown Russian and Ukrainian masters.
Other paintings of the death of Cook were painted earlier.
But The Lady with an Ermine, which does the same, was painted at least 15 years earlier.
It had been painted ten years earlier by a local artist, for free, and everyone knew the Judge had not been particularly fond of it.
The painting was first exhibited at the Royal Academy in 1844, though it may have been painted earlier.
But it was the new paintings in the studio that held his attention, not the ones that he had painted half a century earlier.
The altar itself had been painted earlier by Jacob van Haarlem, the master of Mostaert.