%ril 21, 1924. 
Mr# W. do C, Raven ©1, 
AanlniBtrativo Assistant 
to ti'io Soorotory . 
My dear i-r» Ravenol: 
1 tia*v'’0 boon offered the opportunity of studying the cruetacoa 
of tlio Tortugas region,!:^ tiio Carnogio Inatitition, and should like to 
spend about six ff^-ekB at the faboratoiy tiioro, fr«a July lb to August 26. 
IMb would neooBsltate leaving r'aBhiagtcai not later thm July IE, roi.urning 
September 2, a matter of about eight weeks (63 days in all). 
’iill you not bo so Icind as to grant mo the nocessary two montiiB 
leave for "dotachod service,” or give mo the neoossary detail or orders, as 
tho cuso may b© to enable lao to undertalc© this bit of research. Iho i-asenaa 
would be put to no OKpense, other than for salary during the lntt;rval, and 
would baiofit to lii© ©stent of the oolloctions I shall raak© in cosineotion s/ith 
tny studios. 
I shall, of course, leave the wosk of the Division in such shape 
and so cared for that there will b© no interference with its proper function- 
ing. llr» Suoomakor will act in my staad during my abeenc©. 
Respectfully, 
Through Jr. L. Stojnoger, 
Head Curator of Biolos^. 
