Bob, I have now seen the thread and I don't have an immediate answer. Philip's suggestion of Huntercombe gets it spot on.
Here are a few suggestions off the top of my head, more to give pause for thought than to give a true answer.
My mind turned to Cheadle, a 9-hole course near me which has a number of archaic features, although no chocolate drops. How much of the course survives from the 1890s I cannot say, but you can take a look for yourself:
http://www.golfclubatlas.com/forum/index.php/topic,44829.msg978304/topicseen.html#msg978304I don't know when JH Taylor constructed his mounds etc at Royal Mid-Surrey, but many of them survive.
I fancy that Mitcham Common is little altered from its glory days as the original Prince's GC.
Berkhamsted is an old club (1890) but it saw later work by Colt and Braid. However they retained some of the very ancient earthworks in the course's defences.
There are all sorts of artifices used at Royal Ashdown Forest, some of which, I presume, date back to the club's founding in 1888.
Holywell came into my head for its inventive use of old mining spoil, but it dates from 1906.
Interesting question - thank you, Bob.