Björn Bergenholtz
(former alias "Calalp")

Here's some additional bits and pieces (found along the way while checking/looking for some of Rothschild's many Birds), on the guy commemorated in the scientific name ...
dunstalli as in:
• the invalid hybrid (in Thraupidae) Ramphocelus dunstalli ROTSCHILD 1895 (here), as "Rhamphocoelus [sic] dunstalli", a k a Dunstall’s Tanager
Also commented by Hartert, in 1919 (here):
In today's Key explained as:
He's also mentioned (as such) in The History of the Collections contained in the Natural History Departments of the British Museum, Vol. 2 (1906), on p.343. See below:

He's as well mentioned here (as the same):
He was also included in the Who's Who in Business (of 1914) here (alt. see the attached excerpt below) [my blue]:

Same address (and the very same Initials) are found/shown in the Marconi International Directory of Cable Addresses: Buyers' & Exporters' Guide (of 1922), here.
And: if we're to follow what's told in the Journal of the Quekett Microscopical Club (of 1912) it looks like we ought to look for a George Kirkman Dunstall, residing (also at that point) at "39, Redcross Street, E.C"), see here. And note that he, in the 1915 issue of the same Journal, was listed as: "Dunstall, George Kirkman, F.R.M.S".
Also, as ditto, here (though, without the "F.R.M.S", part, of course).
However, that's all I could find, but maybe it's enough to find him in full?
For whatever it's worth ...
Björn
PS. Beware of a possible mix-up, if following the later traces/clues of his Life ...
In the London Street Directory, of 1921 (here), we find the following addressee at No. 39 (for Redcross Street, Cripplegate (EC1) (City), ...): "Dunstall G K & Son, ostrich feather merchants".
*Larsson, E. J. 2019. Collecting, curating and the construction of zoological knowledge Walter Rothschild’s zoological enterprise, c. 1878-1937. A thesis submitted for the degree of Doctor of Philosophy, King’s College London, September 2019. (see top of p.332).
dunstalli as in:
• the invalid hybrid (in Thraupidae) Ramphocelus dunstalli ROTSCHILD 1895 (here), as "Rhamphocoelus [sic] dunstalli", a k a Dunstall’s Tanager
Received from Mr. K. Dunstall, after whom I have named it. ...
Also commented by Hartert, in 1919 (here):
Type: ... (Trade-skin bought from K. Dunstall)
In today's Key explained as:
... which, in my mind, ought to be expanded into: G. K. Dunstall (fl. from 1892, until at least 1910, alt. even into 1914), Ostrich and Fancy Feather Merchant, who sold Natural history specimens to Rothschild [also incl. Coleoptera (Beetles), as well as various, different Bird skins, for example/s, of Hummingbirds (according to Larsson, 2019*) , and/alt. Bronze Parotias (the latter according to here)]dunstalli
K. Dunstall (fl. 1895) natural history dealer (Ramphocelus dimidiatus x Ramphocelus icteronotus).
He's also mentioned (as such) in The History of the Collections contained in the Natural History Departments of the British Museum, Vol. 2 (1906), on p.343. See below:

He's as well mentioned here (as the same):
Person Name
G K Dunstall; fl 1895-1910; Ostrich and Fancy Feather Merchant
[...]
Activity
Ostrich and Fancy Feather Merchant, of New Zealand Avenue, Barbican, London. Tring correspondent.
Corporate Name
G K Dunstall
He was also included in the Who's Who in Business (of 1914) here (alt. see the attached excerpt below) [my blue]:
DUNSTALL, G. K. Rough Ostrich and Fancy Feather Merchant and Commission Agent, 39, Redcross Street, London, E.C. Hours of Business: 9 a.m. to 6 p.m.; Saturdays, 9 a.m. to 1 p.m. Established in 1892 by G. K. Dunstall, the present principal. Business: Rough Ostrich and Fancy Feather Merchant, Commission Agency. Telephone: No. 11718 Central, London. Telegraphic Address: "Octa chord, London." Code: Lieber's, A B C (5th Edition). Bankers: London County and Westminster Bank, Ltd. (Aldersgate Branch).

Same address (and the very same Initials) are found/shown in the Marconi International Directory of Cable Addresses: Buyers' & Exporters' Guide (of 1922), here.
And: if we're to follow what's told in the Journal of the Quekett Microscopical Club (of 1912) it looks like we ought to look for a George Kirkman Dunstall, residing (also at that point) at "39, Redcross Street, E.C"), see here. And note that he, in the 1915 issue of the same Journal, was listed as: "Dunstall, George Kirkman, F.R.M.S".
Also, as ditto, here (though, without the "F.R.M.S", part, of course).
However, that's all I could find, but maybe it's enough to find him in full?
🧩 🧩 🧩
For whatever it's worth ...
Björn
PS. Beware of a possible mix-up, if following the later traces/clues of his Life ...
In the London Street Directory, of 1921 (here), we find the following addressee at No. 39 (for Redcross Street, Cripplegate (EC1) (City), ...): "Dunstall G K & Son, ostrich feather merchants".
🧩
*Larsson, E. J. 2019. Collecting, curating and the construction of zoological knowledge Walter Rothschild’s zoological enterprise, c. 1878-1937. A thesis submitted for the degree of Doctor of Philosophy, King’s College London, September 2019. (see top of p.332).
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