At the LVA chancery site is a suit filed by Ulrick Spore which involved land which belonged to Christian Dasher:http://www.lva.virginia.gov/chancery/full_case_detail.asp?CF...
On pg. 11, there is what appears to be the signature of Christian Dasher on what is essentially a mortgage for the land he bought. It appears to be an original document (notice the faint reddish marks to the right of his name - from the old wax seal).
(There is another signature for Christian Dasher in the same file but that is for the elder Christian's son. The elder Dasher was dead less than a year after the signing of this document - and he left no will. See the Augusta Co. probate file for Chrisitan Tosher in Eric Hedrick's Original Documents for South Branch residents series of CDs )
The signature from 7 July 1757 can be compared to that of the purported immigrant who arrived on the Ship Samuel, August 30, 1737 (S-H Vol 2:170). There are enough differences in the signatures that researchers should want additional confirmation that both were for the same man.