is not arranged on one level, but follows instead an up-and-down course of steps, landings, cambered bridges, hanging streets . . . a zigzag that ramifies in tortuous optional routes"

One is "spared the bordom of following the same streets . . ." and "can enjoy every day the pleasure of a new itinerary . . ."

"A map . . . should include, marked in different colored inks, all of these routes, solid and liquid, evident and hidden."

EXIT