In The Times, Saturday, Jun 01, 1912 there is an advertisement
Entertainments, &c. Crystal Palace, James Pain and Sons present.............To-Day at 3P.M......On Football Ground: National Gymnastic Display, 5,000 Performers.
The Times, Friday, May 16, 1913. Court Circular. The Duke of Connaught is president of the national gymnastic display which is to take place on Saturday, June 7, at the football ground of Crystal Palace.
The Times, Monday, Jun 09, 1913. National Gymnastic Display at the Crystal Palace. - On Saturday afternoon the third National Gymnastic display by nearly 100 gymnastic societies, gymnasia, and classes chiefly in and around London was given on the football gound at the Crystal Palace.
Stan