A shame we don't have the entire forms, perhaps clippedf or confidentiality, but here we have 9 well-known leaders in the late 19th century evangelical world signing and dating reference papers for someone applying to be a missionary with the China Inland Mission. You can see similar examples of the form, which ends with a question of how well they have acquitted themselves in their extant ministry opportunities [printed on the back here] in D. E. Hoste's "A Prince with God" from 1898.
Six of the nine also have some manusript notes on the rear in the signer's hand
H. W. Webb-Peploe. Important and one of the earliest Keswick speakers.
G. Campbell Morgan.
J. Stuart Holden. Keswick divine and Titanic survivor.
H. Grattan Guinness. Missionary Pioneer, friend of Hudson Taylor, etc.,
F. B. Meyer. Prolific author, Keswick speaker, etc.,
Reader Harris. Well-known scholar and author.
Wm Quarrier. The Scottish George Muller.
Mark Guy Pearse. Friend of Spurgeon, one of the most influential devotional authors of the day.
H. C. G Moule. Bishop of Durham, Keswick speaker, prolific author.