May 22,1940. 
Dr. Williaa M. Mann, 
Director of tlie ^iational Sologioai rark, 
washineston, !). C. 
fi 
Sir 
I am in I'eseii^t of your ore4entials froa 
the Ajaerican Le^^ation and the Interior Deeartaent 
of Idberia. I ora retumint; tlie Interior Iteportaent’s 
letter wiiich you aay present as your sufficient 
Giredentials to the Cliief or the County Craxaissioner 
YTith v&iam you raay coae in oontaet. I eni also writing 
a letter to the Paraaount Cliief of ttie Kporljpaa- 
I^os^oso Seoiiion to renter you all and aa$: assis tones 
you raay require. 
^inoe ely hoping tliis will he suf fie tent 
to faoilitate your aissioai. 
1 SBl, 
G-rand 
