Both Uses

testimonial
in
The Railway Children
(Auto-generated)

'I expect it's the subscription to the Vicar's testimonial,' said Mother, 'or else it's the choir holiday fund.†
p. 7.2 *
Mother tried to make the time pass by telling them a new fairy story about a Princess with green eyes, but it was difficult because they could hear the voices of Father and the gentlemen in the Library, and Father's voice sounded louder and different from the voice he generally used to people who came about testimonials and holiday funds.†
p. 7.9

testimonials = statements that recommend or act as evidence

Definitions:

(1) (testimonial)
something that recommends (or expresses commendation) -- especially a verbal statement
(2) (meaning too rare to warrant focus)