I Shall Pass This Way But Once

[Gunnar Hjalmarsson <quotation-ring@gunnar.cc>]

Below please find a forwarded query from Paulette.
/ Gunnar
Can you tell me if either William Tell or Henry Drummond wrote this
quote:
I shall pass this way but once
Therefore any kindness that I can do
Or any goodness that I can show, let me do it now
For I shall not pass this way again.
Thanks.  I cannot find anything substantial on the internet.