"Thomas Sulman (c.1834 – 1900) was an English architectural draftsman.
Sulman studied at The Working Men's College between 1854 and 1858, where he was a student of, ...
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and later an engraver for, Dante Gabriel Rossetti; he was influenced by the positivist thinkers at the college.
He became a specialist in using balloons to produce birds-eye views of cities including London, Oxford, Glasgow and New York City. These views, as hand-coloured engravings produced with the help of London engraver Robert Loudan Sr., were featured in The Illustrated London News from the 1860s, and were sometimes produced to a fold-out six foot length." - (en.wikipedia.org 14.07.2021)
