Ah, the sweetness of certainty!  This spread appeared — appropriately enough! — on page X1 of the New York Times on Decmber 9,1906, when Lowell was — if not “recognised as the greatest authority” on the Red Planet, certainly the only one with his own Observatory from which to study it.

I just love the design of this piece (do check it out in full at the link above, it’s a gloriously giant PDF).  The Martian globe seems particularly evocative when seen from below:

and why not throw a shepherd in there, sure!

And as for the content…

Well, The New York Times has been wrong about bigger things, I guess.