from &amp;#8216;surveying the alps&amp;#8217; by jeffrey karstner
cabinet magazine - &amp;#8216;mountains&amp;#8217; issue 27, fall 2007, p. 88:

a view of the matterhorn from the st. niklaus valley, drawn by hans conrad escher, 14 august 1806

(206 years on, today. thanks to filipa ramos for spotting this&amp;#8230;)