Hi Lena,
Thank you so much. I believe you really have found the right Caroline, there simply could not be so great a coincidence. It is a long story, but I am descended from Anders de Flon who arrived in Sydney Australia in 1857. I tried searching for his parents 20 or so years ago, and got nowhere. I have no documentation of his father's name, but do have a certified copy of his marriage certificate which gives his mother's name as Caroline Luhlberg. It is only recently when I started searching on the Internet, and got zero hits to a worldwide search for the one word Luhlberg that I started to question the certificate. I do have a letter written to Anders by his brother in 1878 in which he refers to an uncle, who owned a farm in Minnesota. The two page letter, written on both sides on fine paper has remained folded for, I assume, more than 100 years, and is falling apart. The uncle's name is written on a fold. However, reassembling the letter, darkening it in photocopying, and then using a bright light and magnifying glass, it was possible to make the name out to be Sohlberg and this was confirmed by finding a Land Record in his uncle's name. Yes, clerks do make mistakes in writing down.
Out of curiosity, how did you come to be looking at Sohlberg message board? Do you have a connection?
Thanks again
Bob