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18 guess is correct. I got to the herbarium at 8:15 this morning, but ran out of envelopes (have plenty in my room) so quit at 4 p.m., being Sunday. I am in Andropogon Sorghum and all its subdivisions. Like lots of other human beings Hackel did not always publish the name he put on the sheet, but there are, so far, very few things that do not come out with perfect certainty. The Sorghum gessamtart is not in as good shape as the other things I have been through so far. There are a lot of unpublished Hackel names. I have recorded all these, lest some day a visitor publish them. Heaven send Mez never gets here! I did not finish the fourth case today. It does not look as if I would be through in a month. I am going as rapidly as possible. It is very hard not to stop to look at some of the unfamiliar things. I never realized how poor we are in old world material. I am getting some besides Hackel species. I have a good specimen of Ratzbergia! It has the most impossible inflorescence. I want to diagram it some day. Hackel's species and vars. together number 1178 in the mss book. I am getting many more. The names based on Thwaites' so-and-so not somebody else, which were not listed because based on another type are really Hackel types, since it was err. det. Thwaites. Therefore, I take it, the Thwaites plants, misidentified by Thwaites and renamed by Hackel are the types. There are other cases of the same kind. At the rate I am going I shall have over 1500 from this herb. [[strikethrough]] Han [[/strikethrough]] I hope some way can be devised to send money for mounting paper--not to pay for t these priceless specimens. Some of the U. S. things, Androp. Hallii, for one, is not here. I surmise they were sent back and our supposed duplicate type is the type. Dr. Z invited me to the next botan. Sitzung. Of course I accepted with "vergnugen", though I will not understand anything. I marvel at