I've been reading a copy of The Australian Golfer, written by Dan Soutar and published in 1906. There's some fascinating content. It features among many other interesting tidbits, a table (including weights) of Vardon's clubs, as well as lists of the clubs (and their lengths) as used by the great triumvirate and Soutar.
As presented, Vardon was the only one to use a niblick. Soutar (designer of Kingston Heath and several other courses) also carried ten clubs, which included a spare driver, and his most lofted iron was a mashie niblick, whereas Braid and Taylor both relied upon a mashie as their most lofted club.
Vardon's ten clubs, as listed in Soutar's book, closely resemble those presented in the article at the start of this thread, with the exception of a direct reference to the mongrel mashie. Soutar seemed to know of Vardon's preference to carry both a driving mashie and driving cleek.
MM