I am writing a to a business recipient and ended up with the following sentence (version 1):
Yes, I am aware that your company is not operating this system anymore, but would be most interested in past/historical data, hence me contacting you.
Alternatively, I thought about changing the last part of the sentence to (version 2):
... hence I contacted you.
Ngrams seem to favor version 2, but I have the feeling I read version 1 before. This source seems to indicate version 1 is correct (see the second example, "hence means from this source").
Are both forms correct? Is there a preferred one in this case? Why?