D*»ouber X?. 1940. 
Br. Herbert L. Mason, 
Curator of the Herbarium, 
n rirersity of California, 
Berkeley, Calif, 
hear.Hr* Masons 
In June 1939 I sent you a lint of the collectors num¬ 
bers of the ^determined J. ?, Bock specimens frora China in the 
*7. S. National Herbarium between the numbers 30,000 and 28,000 with 
a request for their names. You very kindly filled in the names as 
far as you had them and returned the list, four assistance i-ns much 
appreciated. la the course of my curatorial -,;orh since that time 
I have redetermined a number of these specimens and found others 
cited in literature, and have determined end found cited other 
specimens not on the list. I am therefore sending you herewith a 
list of these determinations for your use in curating your collec¬ 
tions. 
You may recall that sons years ago you at me a list of 
the undetermined Sock specimens in your herbarium from the first 
expedition to China, that Is vita numbers up to 11,000. I filled in 
sow® nance from the records here avid sent you the list. After 
transferring the names to your specimens you returned the list. 
As I have now a few acre determinations I <m again sending you this 
list. 5?ho additions Just made are inserted by hand. If you will 
again return this list to me, 1 shell see that acre annas are reported 
to you when I have another lot. If does not soe» reusable to hold 
this list till, nil the determinations are made, but rather it seems 
best fa report a few at a time. 
if you have any recent determinations or find, errors in 
those determinations being reported, I would greatly appreciate your 
letting ne have them. 
Sincerely yours. 
Aid. Div. PI 
