CHARLESDARWINTOJ。D。HOOKER。
Down，June10[1864]……IhavenowreadtwoGermanbooks，andallIbelievethathasbeenwrittenonclimbers，andithasstirredmeuptofindthatIhaveagooddealofnewmatter。Itisstrange，butIreallythinknoonehasexplainedsimpletwiningplants。Thesebookshavestirredmeup，andmademewishforplantsspecifiedinthem。Ishallbeverygladofthoseyoumention。
IhavewrittentoVeitchforyoungNepenthesandVanilla（whichIbelievewillturnoutagrandcase，thougharootcreeper），ifIcannotbuyyoungVanillaIwillaskyou。Ihaveorderedaleaf—climbingfern，Lygodium。
Allthisworkaboutclimberswouldhurtmyconscience，didIthinkIcoulddoharderwork。（Hewasmuchoutofhealthatthistime。）
[Hecontinuedhisobservationsonclimbingplantsduringtheprolongedillnessfromwhichhesufferedintheautumnof1863，andinthefollowingspring。HewrotetoSirJ。D。Hooker，apparentlyinMarch1864:——