Which preposition to use with elderberries

for Occurrences 1%

Thus, when Greenbaum called upon Mr. Elderberry for advice, it savored strongly of Koko's consulting Pooh-Bah and was sometimes almost as confusing, for just as Pooh-Bah on these occasions was won't to reply, "Certainly.

in Occurrences 1%

When Mr. Greenbaum was summoned to the telephone and informed by Mr. Elderberry in disgruntled tones that somebody had just served upon him an order to show cause why the proposed reorganization of Horse's Neck should not be set aside and enjoined, he not only became instantly annoyed but highly excited.

Which preposition to use with  elderberries