l'arc délié des ponts, the light arch of the bridges
9. comme ces figurants de théâtre, etc., like those dummy characters on the sta^e who pa^s from one wing to the other to give a hetter illusion of surrounding life,
10. Ce sont de vrais hommes, etc., thèse are real men driven through an aerial trajectory from bank to hank hy the unflagging racket, etc.
11. le frais Léthé, in the Greek mythology Lethe was a river of Hades whose water when dnmk caused forgetfulness.
Page 55. 1. la population du grand boulevard fluvial, the people who Vive on the main th^oroughfare of the river.