William de Leftwich Dodge, muralist, with half of his six section 200 foot mural for the Tower of Jewels at the 1915 Panama-Pacific Exposition, San Francisco

1 clue in this photo

1Scale

One man and a 200-foot mural

One man stands beside a mural about 200 ft long in the Palace of Machinery, under an exposed timber lattice frame. The frame is wood, which supports the temporary-build account.

The questionHow was a mural this size painted and hung on the schedule given?

Photo: farthing2 · Public domain · via Wikimedia Commons

San Francisco 1915 Case file

Same kind of clue, elsewhere

#10Scale · St. Louis 1904Twelve men and a tripod to plant one treeIf one tree took this much effort, what did the palaces take?

Scale · London 1851Carriages for scale along the north-east frontAt that scale, what did the hauling and erection really require from a horse-powered city?

Scale · Philadelphia 1876Crowds give the scaleHow many stone-setters and teams would a hall like this need on the timeline recorded?

Scale · Paris 1889The Galerie des Machines at true scaleHow was a span that size raised for a single season?

Scale · Chicago 1893The Court of Honor with crowdsAt this scale, what were the crew and horse counts needed for about 200 buildings in about two years?

Scale · Atlanta 1895A horse and wagon unloading cratesHow many wagon trips would it take to supply a whole fair this way?

All clues others missed →