"of which...of"

[Jonathan Lighter]

Unless I miss my guess, this truly nonstandard construction is usually
associated with latter-day neophyte writers.

However, here's a 1928 ex. from an academic writer that sailed through
copy-editing. I assume it was a slip of the pen:


1928 Angelo S. Rappoport _Superstitions of Sailors_ (London: S. Paul) vii:
 It may be attributed to three sources, viz.: Firstly, the interpretation
and explanation of numerous phenomena actually observed, but the cause of
which the early mariner was still ignorant of.

JL

--
"If the truth is half as bad as I think it is, you can't handle the truth."

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