Note 235 — I THE RATE FOR LETTERS (continued 2)

The ascertainment of the direct distances was commenced in 1823. It was completed in a year and a half (including two revisions), and a map of distances prepared. There were 1,386,506 distances to measure, and the measuring was done by land surveyors. The distances so measured were tabulated for practical use by postal officials.—H. von Stephan, op. cit., p. 746, n. 3; Moch, Archiv für Post und Telegraphie, 1893, p. 2.