The 21-year-old spent the first half of the campaign on loan with the Buddies but returned to his parent club last week ahead of their FA Cup third-round clash with Brighton.
While the Barclays Premier League side slid to a surprise 2-0 defeat against Gus Poyet's npower Championship outfit, Dummett fulfilled his boyhood ambition by making his first-team bow when St James' Park boss Alan Pardew introduced him a as a half-time substitute.
But the young defender believes he will improve further if he returns to Paisley for a second loan stint. He now hopes to once more swap the black and white stripes of Newcastle for those of the Saints and is praying the deal is completed before Danny Lennon's men face Celtic in the Scottish Communities League Cup semi-final on January 27.
Dummett said: "I loved my time at St Mirren. For a Newcastle lad playing for the club, it's not easy moving away but St Mirren was the right choice.
"I played 19 games and picked up some really good experience of playing at a competitive level. I played in front of some big crowds like 40,000 at Celtic Park. There's no doubt that has helped my development as a player.
"I have definitely come back to Newcastle a better player.
"Danny Lennon is a really good manager and I can't fault a single thing about the club. It was his help that allowed me to make my debut for Newcastle.
"But I'm hopeful that I will come back to Saints for another six months. I've improved so much with them this season and I want to continue that development before going back to Newcastle a much better player in the summer.
"It's not in my hands but, if both sides can make it work, returning before the semi-final with Celtic is the plan."
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