Williams started Wednesday's meeting one win behind Damian Lane who was not riding at the meeting and will also miss Saturday's meeting at Caulfield.
Williams drew level in the opening race with victory aboard the Shea Eden-trained two-year-old filly Bright Eyes and then added another on three-year-old filly Jungle Queen.
The reigning premier rider in Melbourne said it was great competition again this season with Lane a formidable challenger.
The one-length win of Jungle Queen ($5.50) in the Woodside Park Stud Handicap (1000m) was significant for Wangaratta trainer Christopher Davis who celebrated his first metropolitan winner.
“We've always thought she's a little bit better than bush class,” Davis said.
“I've hit a bit of a flat spot of late but it was good to get another winner,” Brown said.
Stephanie Thornton also achieved a milestone at the meeting, with her win on $3.50 favourite Belwazi in the Sheamus Mills Bloodstock Handicap (1000m) bringing up 19-year-old apprentice's 100th career winner.
“I felt like I've been stuck on 99 for a couple of weeks now so it's great to get the monkey off the back,” Thornton said.
“It's a great milestone for me and hopefully now with another city winner I can keep the momentum going.”
Thornton did keep the momentum going, guiding Nordic Empire to a front-running win in the next race, the Mittys Handicap (1200m), taking her tally of city winners in Melbourne this season to 24.
Nordic Empire ($4), who had won at Sandown earlier this month at his most recent start, opened up a winning break around the home turn and scored by 1-1/2-lengths over $3.10 favourite Demolition.