"Rec May 15 Berlin April 3,1867 
Ans Jun 18 
Dear Engelmann: 
Yesterday I received your letter of March 10 and was very glad 
to learn from the postscript that my letter arrived.:I have been very 
industrious with Taufonı which took a lot of time,thoush I had the 
help of a student to prepare the length - and crosswise cuts of leaves 
for microscopic work. I reexamined many species for stomata and vascüu- 
lar bundles,; and convinced myself of the need to be exact to be cer- 
tain. I also reworked both species for sclerenchyma cells. I now have 
firished with all that is available to me and not much else may be 
on hand in the herbaria.. The more one must expect that more is to be 
discovered consideringz the vast exXpanse offland from which Isoetes are 
totally unknom,e.z. Mexico and Central America,the entire southern 
tip of America,Southafrica, Newzealand, a.s.0o. 
April 19. I have been interrupted thoush my moving (to the 
Koch street). This was a mean job and I will be occupied for weeks to 
get the packs of plants and books etc. back in order. I had been 16 
years in the previous home and it was difficult for me to leave. How- 
ever moving has its zood sides, as all kinds of long forgotten Items 
reappear and much can be put into better order.Only the loss of time 
is serious. I want to report today about the results of the last in- 
vestirations into the northern Isoetes,so that we may not get into 
Gontradietions and our work will be harmonious. May-be my letter will 
oeeuras you to modify some items in thetreatment for Grayy but if 
this is not possible any more,then tell me at least,how and under what 
name you have treated a species,so that I may refer to it in the next 
publication.I presented in the academies already in March an overview 
of the Isoetes, and I can have this printed in the monthly report as 
soon as I can relax in my new home, but m net de: this until I 
get a reply from you about the information of today and your assess- 
ment of it. It is in fact timely that something be published, because 
< z 
7 8 9 10 MISSOURI 
| | BOTANICAL 
(efoJe)ligtelaim c-ti-iall-Te GARDEN 
