"How eerie!" said the girl, advancing cautiously. "--And what a heavy door!" She touched it as she spoke and it suddenly swung to with a click.
     Good Lord!" said the man. "I don't believe there's a handle inside. Why, you've locked us both in!"
     "Not both of us. Only one of us," said the girl, and before his eyes she passed straight through the door, and vanished.

Afterword
     I first encountered "Climax for a Ghost Story" on the last page of the first issue of Avon Fantasy Reader. No information is given about the author in the issue and there is no copyright notice for the story in the indicia. This led me to believe that either the story was in the public domain in 1947, or that I. A. Ireland was a pseudonym (possibly of Wollheim) and that the copyright notice had been accidentally left off while trying to protect the author's true identity. After checking the usual references, the best that could be discovered was a date of 1919 attached to the story with no further publication data.
     About the time I was ready to give up the ghost (no pun intended), I stumbled across an Italian SF/Fantasy site which lists a story entitled "Finale per un racconto fantastico" written by I. A. Ireland that appears in an Italian anthology Antologia della Letteratura Fantastica edited by Luis Borges. This same book was available in English as The Book of Fantasy and therein is found the only known biographical material on I. A. Ireland:
I. A. Ireland, English savant born in Hanley in 1871. He claimed descent from the infamous impostor William H. Ireland, who had invented an ancestor, William Henrye Irlaunde, to whom Shakespeare had allegedly bequeathed his manuscripts. He published A Brief History of Nightmares (1899), Spanish Literature (1900), The Tenth Book of Annals of Tacitus, newly done into English (1911)
.      So, there you have it. I. A. Ireland was a real person, or at least in the eyes Luis Borges, and that's good enough for me. We also assume the work to be in the public domain.