It was the first apparition of Jacob Marley
IN Stave one he is in shock to see what he though was Marleys face appear on the brass door knocker. This was the starting point for what was to come. In the stave 5 Scrooge checks the knocker does not change meaning Marley was not coming back to haunt him
On the door knocker of the front door
The face of Jacob Marley appears in Scrooge's door knocker in "A Christmas Carol." Marley, Scrooge's former business partner, serves as a warning to Scrooge about the consequences of his life choices.
The ghostly image of Marley appears
Marley's face appeared on the door knocker of Scrooge's house, as Scrooge arrived home on the night of Christmas Eve. This haunting image marked the beginning of the supernatural events that transformed Scrooge's life in "A Christmas Carol" by Charles Dickens.
When Scrooge arrived home on Christmas even from the local Inn where he always ate after his work the brass door knocker took on the resemblance of his departed friend and business partner Jacob Marley
Marley appeared to Scrooge in several places, but all were at his house. The first glimpse Scrooge gets is in the doorknocker, and then in several places in his room, and finally Marley appears in full body, floating through the locked door to talk to him.
He sees the ghost face of his late business partner Bob Marley. Ooh! Scary! Merry Christmas!
The vision of Jacob Marley's face in the brass door knocker
a ghostly vision of Jacob Marley
It briefly turned into Marley's face