The first would be the only effect for the entire show:
"Chronomadic" in T.A. Water's Mind, Myth and Magik. A guest at a house party in your home (or a home of a friend) becomes fascinated by an old photograph of a man standing by a chair which has a single rose. You explain that the man is an old nineteenth century psychic. Your guest insists that you hold a seance to summon his spirit, the other guests oblige. During the seance the man's voice talks to your guest and then there is a scream. Your guest is gone and on the chair is the outline of a rose in ashes. Later, a guest notices that there is no longer a rose on the chair in the picture, but instead a woman in period dress that resembles the disappeared guess sits in the chair with the psychic looking lovingly at her.
The second effect would be one of several effects in the show:
"For Better or Worse" from Walt Anthony's Tales of Enchantment. A borrowed finger ring appears on a severed finger inside a wooden box during a tale of marital infidelity.
Christopher -- if you don't have Mind, Myth and Magik and Tales of Enchantment, you need to get them.