“The system of gymnastics for the hand, invented by Mr Edwin Jackson, is, in my opinion, calculated to be of great service to musical professors and students, from the increased strength and flexibility the fingers must gain by practice under this method.”
From H. C. Deacon, Pianist.
July 28th, 1865.
“I think your system of hand-exercise, as explained to me the other morning, likely to be a useful adjunct to the pianoforte, inasmuch as it tends to give increased extensions to an important part of the hand.”
From James Howell, Contrebassist, Royal Italian Opera.
August 25th, 1865.
“It is with great pleasure that I testify to the soundness and excellence of your system of gymnastics for the hand, as giving flexibility and power to the fingers. It would prove of great advantage to any member of the musical profession, if properly carried out.”