Question: What was the name of the man, who was billed by the coiner of the phrase "There's a sucker born every minute" as "Boy Lightning Calculator"?

Context articles: Loving Every Minute (Mark Wills song)
Willis Dysart
There's One Born Every Minute
The Flim-Flam Man
List of One Born Every Minute episodes
P. T. Barnum
One Born Every Minute
There's a Fool Born Every Minute
There's a sucker born every minute
William S. Hutchings

"Loving Every Minute" is a song written by Michael White, Tom Shapiro and Monty Criswell, and recorded by American country music artist Mark Wills.
 It was released in April 2001 as the first single and title track from the album "Loving Every Minute".
 The song reached number 18 on the "Billboard" Hot Country Singles & Tracks chart.
Willis Nelson Dysart (March 15, 1923 in Omega, Georgia - November 8, 2011) was an American mental calculator.
 His talent for arithmetic emerged at the age of three after his mother taught him to count.
 He quit school in the third grade (age 9) and pursued a career as a lightning calculator.
There's One Born Every Minute is a 1942 American Universal Pictures comedy film directed by Harold Young.
 It was the debut film of Elizabeth Taylor.
 It is also known as Man or Mouse.
The Flim-Flam Man (titled "One Born Every Minute" in some countries) is a 1967 American comedy film directed by Irvin Kershner, featuring George C. Scott, Michael Sarrazin, and Sue Lyon, based on the 1965 novel "The Ballad of the Flim-Flam Man" by Guy Owen.
 The movie has well-known character actors in supporting roles, including Jack Albertson, Slim Pickens, Strother Martin, Harry Morgan, and Albert Salmi.
"One Born Every Minute" is a British observational documentary series which shows activities taking place in the labour ward.
 The first series aired on Channel 4 starting February 9, 2010, the second in 2011.
 Series 7 made its debut on 10 March 2015.
 This factual series is produced by Dragonfly Film and Television Productions, which is part of Shine Group.
Phineas Taylor Barnum (July 5, 1810 – April 7, 1891) was an American politician, showman, and businessman remembered for promoting celebrated hoaxes and for founding the Barnum & Bailey Circus.
 Although Barnum was also an author, publisher, philanthropist, and for some time a politician, he said of himself, "I am a showman by profession...and all the gilding shall make nothing else of me", and his personal aim was "to put money in his own coffers".
 Barnum is widely, but erroneously, credited with coining the phrase "There's a sucker born every minute".
One Born Every Minute is a British observational documentary series which shows activities taking place in the labour ward.
 The first series aired on Channel 4 in 2010, the second in 2011.
 Series 7 made its debut on 10 March 2015.
 This factual series is produced by Dragonfly Film and Television Productions, which is part of Shine Group.
"There's a Fool Born Every Minute" is a song written by Paul Evans and Paul Parnes.
 It was recorded and released as a single in 1968 by American country artist, Skeeter Davis.
"There's a sucker born every minute" is a phrase closely associated with P. T. Barnum, an American showman of the mid-19th century, although there is no evidence that he said it.
 Early examples of its use are found instead among gamblers and confidence men.
William Street Hutchings, (January 7, 1832 - August 25, 1911) also known as Professor Hutchings and the Lightning Calculator, was a 19th-century math prodigy and mental calculator who P. T. Barnum first billed as the "Boy Lightning Calculator".
 He later worked as a sideshow barker and wrote a book called "The Lightning Calculator".