In its early years the course was tinkered with and lengthened a bit.
April 1901 Golf Magazine -
Sept. 1901 Golf Magazine -
Sven, Great work! Here is a 1930 aerial showing 27 holes.
Reading through your descriptions of each architect’s recommendations, it is very likely the 14 holes to the south of the clubhouse (in the 1930 aerial) are the holes laid out by Willie Park Jr.
Both Barker and Ross changed hole sequences more than they changed the routing. They may have added bunkers and greens, but the 1919 routing was relatively unchanged from the 1901 map posted above. Both Barker and Ross seemed to concentrate on the first nine holes and never mentioned adding additional holes.
One of the articles on Willie Park’s work mentions he built 14 holes. 9 entirely new holes and 5 to replace the old 1, 10, 11, 15 and 16 which you can see on the 1901 map above. Today’s 1-13 follows Parks routing for the most part. The second hole has been shortened to avoid an approach over the main road and the fifth has been lengthened using the old green site of the 2nd. Willie’s 10th and 11th were combined into one hole.
The 15th and 16th hole on the 1930 map (today’s 14 and 16) closely follow the 1901 map. 17 and 18 appear to be similar in 1930 to now, but none of the articles mention who built these two holes. 17 and 18 do not follow the routing of the 1901 map.
Much of the land to the north of the clubhouse was sold off some time between 1938 (Svens golf guide) and the 1951 (aerial showing development where there was once a golf course). The bulk of today’s course appears to be routed by Willie Park Jr. based on what I read above and cross-referencing the information with the 1901 layout.
Bret