Jeff
I think the letter from Gibbs shows that Mackenzie seemed somewhat oblivious to the safety impacts of roadways and houses and there is little doubt that holes 6, 7 and 8 got compacted together, with the result being what we see today. An earlier report from Gibbs in October 1928 indicated that in Mackenzie's first plan there were houses inside the golf course but these were dropped as Gibbs considered this housing area too small and difficult to develop, and so were supposed to be eliminated in future versions of the plan. However, looking at the 1929 Olmsted plan of Pasatiempo included in the club's history book, it appears there were two largeish lots included internal to the course, between the 8th and the 2nd, and between the 6th and the 4th tee. The street that accesses these houses is called Bird Hill Lane, and if these houses were not there, 6, 7 and 8 could have been spread out more. However, by the sound of what Gibbs says, these lots internal to the course were not forced onto Mackenzie.
Jim
I know that Gibbs did not specifically speak of the safety issues at 6,7 & 8, but I thought his comments about Mackenzie's views on roadways etc were instructive as to how he approached the planning of the course.