"Chin Nam said to me that we won the first Carbine Club that was raced here," Cummings said. "I didn't realise that until he told me.
"It's nice to have a winner on Derby day and it's nice to win for Chin Nam, who's been a loyal client over many, many years."
Cummings said he had no issues freshening Lunar Rise up for the Group Three mile race.
"There was no problem doing that. He's okay, he was fit for the race and I think he's done a pretty good job."
Lunar Rise's next mission is undecided.
"We'll sort that out in the next few days, probably by the end of the week," Cummings said.
Meanwhile, Cummings was impressed as he watched one of his two Melbourne Cup runners, Precedence, work on Saturday morning.
"Precedence with age is working better. This morning, I think it's the best he's worked ever," Cummings said.
SOUTHERN SPEED is out of Tuesday's Melbourne Cup after suffering a career-threatening leg injury at trackwork.
Trainer Leon Macdonald said the mare had worked well yesterday morning but jockey Nash Rawiller had concerns when he was pulling her up.
"Nash said he wasn't happy with how she pulled up and when I went to look at her, it was obvious she had a bad injury to a fore leg," Macdonald said.
The 2011 Caulfield Cup winner, Southern Speed missed that race this year and ran an eye-catching sixth in the Cox Plate to set up a Cup start.