The "Eighth" hole in the 1923 picture is West #4.
On opening day, a composite course was played with that day's hole numbers posted as in the picture.
West #4 is the only green of 36 radically altered since 1923.
In c 1933, the center dip was filled, most likely due to agronomic difficulties.
That corner of the property has always had issues with standing water and stagnant air.
Those issues have been greatly ameliorated in the past few years, via drainage, tree control, fans, and loads of hard work and TLC from the grounds crew.
A recently rediscovered movie highlights from the 1929 US Open (thank you, Shannon Doody at the USGA Museum)
shows, inter alia, several golfers putting through the swale. IIRC, it is Sarazen, Jones, and maybe Hagen or Denny Shute.
The view from behind shows the putt from the back as it goes down, disappears in the swale, and comes up near the pin.
There are some who would like to see that green restored, if there was confidence that the agronomic issues were definitely resolved.
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The baskets were used throughout the 1920s, up until the National Open.
I have not noticed them in any photos post-1929.
I'd guess we decided to stay with the flagsticks after the Open.
We have a few Baskets that we occasionally put on the finishing holes for special events.