Notes:
Notes:
"He served as consulting engineer to Portland's Lewis and Clark Exposition, held in 1905. His accomplishments in Portland led to his employment as the Director of Works for the Seattle exposition which opened in 1909. Seattle wanted "a man who could work fast and save." Allen was given two and one half years to complete his portion of the work for the exposition. He finished it in one year and ten months. Allen was hired as the Director of Works for the Panama-California Exposition in January 1911. His first order of business involved the topographical survey of the area which he felt needed to be completed before the arrival of Bertram Goodhue, the noted New York and Boston architect."