At the turn of the 19th century Los Angeles and Salt Lake City were among the burgeoning metropolises of the new American West.
By the mid 1800's, Salt Lake City had started to decline.
mnli hypothesis: By the mid 1800's, Salt Lake City had started to decline. premise: At the turn of the 19th century Los Angeles and Salt Lake City were among the burgeoning metropolises of the new American West.