Mary Wollstonecraft Shelley
Frankenstein; or, The Modern Prometheus
London: Printed for Lackington, Hughes, Harding, Mavor, & Jones, 1818.
Purchased by Pierpont Morgan in 1910
Vol. I, pp. 144–145
The sky above was serene;
And the clouds were gathering on the horison, mass rising above mass, while the lightning they emitted shewed their shapes and size.