The above engraving of Buenos Aires by John Byrns can be found in the Museo de la Patagonia in Bariloche. Problem is, I can’t identify where this view would be today. My guess is somewhere downtown due to the number of churches visible. Would that be the arroyo where Calle Chile is today? Or is the bluff Parque Lezama?
Update (25 Feb 2011): Working on another project, I stumbled across a few more lithographs online. Looks like they could be from more or less the same angle. Identifying the churches would be the easiest way to determine exactly where these were etched: