By
  Dominique Jando
Harold Alzana was, from the late forties to the mid-sixties, a
  star fixture of Ringling
  Bros. and Barnum and Bailey Circus. His daredevil
  manner—working on the high wire without a balancing pole and at
  high speed, which contrasted with the traditionally slow, seemingly careful,
  approach of the great high wireacrobats, such as The
  Wallendas, that had preceded him—inspired many of the
  high wire acts that are seen today.
He was born Harold Davis on September 19, 1917 in Maltby, a small
  mining town east of Sheffield in South Yorkshire, England. His father,
  Charles, worked there as a coal miner, but he was also an amateur acrobat,
  and he began training his children (Harold, his brother Edgar, and their
  sisters Hilda and Elsie) in his backyard, where he had installed a tight wire
  two feet off the ground.
Charles’s training got good results: At age six, young
  Harold made his performing debut in local fairs and festivals. But this was
  just fun; when he reached fourteen, Harold Davis, like most young men in
  Maltby, followed in his father’s footsteps and began working as a
  coal miner. In 1941, he married his sweetheart, Minnie. World War II was
  raging, but Harold and his siblings never stopped practicing and improving
  their high wire act.
From The Coalmine To The Big To
The war over, Harold Alzana decided to leave the darkness of
  Maltby coalmines and tempt his luck in the circus spotlights: It was social
  climbing in every sense of term! His break came in 1946, when impresario
  Clem
  Butson, then producer of Blackpool’s Tower
  Circus, gave “The Sensational Alzanas” (as Harold and his
  siblings had named their act) a contract for the summer season. The highlight
  of the act was Harold crossing the wire on a bicycle with his sisters hanging
  from a trapeze suspended under it.
If it was certainly, from the audience point of view, a
  spectacular finale, it was not in actuality much of a trick since the trapeze
  provided Harold’s bicycle with a counterweight: The more at risk
  were actually Hilda and Elsie. But Harold’s solos on the wire were
  another matter altogether, and this didn’t fail to impress one of
  John
  Ringling North’s European talent scouts. Johnny North
  immediately saw star potential in Harold Alzana, and the act was booked for
  the 1947 season of Ringling Bros. and Barnum & Bailey Circus,
  The Greatest Show On Earth.
Thus, the Alzanas moved to the United States, minus Edgar, who
  decided to stay in England. (Edgar would eventually create his own high wire
  act, The Derricos.) Their first appearance at the Madison Square Garden in
  New York, where The Greatest Show On Earth traditionally
  began its season, was an unmitigated success. Harold started his act climbing
  a wire at a 45º angle up to his platform, without the help of a
  balancing pole. His various crossings with his sisters were interspersed with
  his fast-paced solos, notably a high-speed tempo rope skipping with carefully
  staged near-misses. Like his ascent to the platform, Harold’s solos were all
  performed without balancing pole or safety device.
Solo Star Performer
Staging the impression of danger is common
  circus practice, but it doesn’t preclude the reality of
  danger, whether it is or not apparent to the audience. Harold
  Alzana had his share of accidents, including one in his very first season
  with The Greatest Show On Earth—a forty-feet
  fall with his sister Hilda, in which both performers were injured.
  Eventually, Hilda and Elsie decided to retire from the act, and Harold
  continued to work as a solo performer, with increasing
  success.
Harold Alzana remained with Ringling Bros. and Barnum &
  Bailey until 1964. During that time he returned to Europe only twice: The
  first time for the Christmas season of 1949-50 at the Harringay
  Arena in London; the second time in 1963, with The
  Greatest Show On Earth, in a short-lived European tour that was a
  disappointment and was quickly aborted—although Alzana’s
  personal success was as big in Europe as it had been in the United States. He
  made a last appearance in Europe in 1966, in the hit British television show,
  Hippodrome (known in the United States as Live
  From The Hippodrome).
Harold Alzana continued to perform sporadically until the early
  1970s, and then retired to his home of Sarasota, Florida, America’s
  “Circus Capital.” But he kept a wire rigged in his backyard, and
  continued to practice regularly, well into his eighties. In 1991, he was
  induced into the International
  Circus Hall of Fame in Peru, Indiana. Harold Alzana passed away on
  February 23, 2001, leaving the souvenir of one of the greatest high wire
  performers of all times.