Simpson did quite a lot of work in Spain (maybe that's why he liked it so much!!!).
- Reconstructed Puerta de Hierro after Spanish Civil War (1946-1949)
- Built new 9 holes in Puerta de Hierro (1947-1949)
- Remodelled Malaga after the Civil War (1946), originally a Colt course
- Remoldelled (very slightly) Pedreña (1946), together with Javier Arana
- Taught Javier Arana all there was to know about how to design a golf course.
- Discovered the land that was later to be site of El Prat, near Barcelona. Same thing for La Toja, near Vigo.
- Remodelled 9 holes of Terramar, close to Barcelona
I don't know exactly what he did in the other courses, but in Puerta de Hierro routing of 7 of his original holes remain (out of 13 originally built by him). Up until 1998, routing remained for all of them, but some holes had to be changed due to land being lost to a nearby highway. However, members were not very fond of three things that were removed over time: centreline bunkers, hollows and hillocks close to the green and green contours. They disappeared in the lapse of 10-15 years after Simpson left.
Regards,