Analysis of information sources in references of the Wikipedia article "The Colossus (painting)" in English language version.
So young that barehanded, wild / among the ranks it boldly throws itself
— p. 63, verse IV.
See how on a peak
of that cavernous amphitheatre,
set alight by the setting of the sun
a pale Colossus is revealed
that was the Pyrenees
humble setting for his gigantic frame.
Around his waist
flaming western clouds,
giving terrible expression to his stature
his eyes lit by sadness
and along with the highest mountain,
his shadow darkens the horizon.— Juan Bautista Arriaza, "Profecía del Pirineo", in Poesías patrióticas, Londres, T. Bensley, 1810, pp. 27–40, vv. 25–36.
In the old photographs of the painting, although it is not possible to see the number, with good definition, it is possible to make out the numbers' relief and to identify it.In my opinion, this can be done by studying, in detail, the published prints in two books about Goya: 'Goya and the democratic tradition' by Francis Klingender, published in 1948 and 'Goya' by Robert Delevoy, with an English edition published in 1954. Several numbers are visible in the photographs in both of these books and the number 18 can clearly be seen.
— Glendinning, art. cit., 2002, page 30
