does not become _whom_; as "_Who_ do you speak to?" "_Who_ do you
expect?" "_Who_ is she married to?" "_Who_ is this reserved for?"
"_Who_ was it made by?" Such sentences are found in the writings of
our best authors, and it would be presumptuous to consider them as
ungrammatical. If the word _whom_ should be preferred, then it would
be best to say, "For _whom_ is this reserved?" &c.