Let us try Schulenburg.

We shall know at any rate that to Grumkow, in the Autumn 1731, these words were luculent and significant: consciously they tell us something of young Friedrich; unconsciously a good deal of Lieutenant-General Schulenburg, who with his strict theologies, his military stiffnesses, his reticent, pipe-clayed, rigorous and yet human ways, is worth looking at, as an antique species extinct in our time.

He is just home from Vienna, getting towards his own domicile from Berlin, from Custrin, and has seen the Prince.

He writes in a wretched wayside tavern, or post-house, between Custrin and Landsberg,--dates his letter "WIEN (Vienna)," as if he were still in the imperial City, so off-hand is he.
No.1.TO HIS EXCELLENZ (add a shovelful of other titles) LIEUTENANT-GENERAL HERR BARON VON GRUMKOW, PRESIDENT OF THE KRIEGES-UND DOMANEN-DIRECTORIUM, OF THE (in fact, Vice-President of the Tobacco-Parliament) IN BERLIN.
"WIEN [properly Berlin-Landsberg Highway, other side of Custrin], 4th October, 1731.
"I regret much to have missed the pleasure of seeing your Excellency again before I left Berlin.

I set off between seven and eight in the morning yesterday, and got to Custrin [seventy miles or so] before seven at night.