PRCo route numbers revisited

[Dietrich, Robert J.]

Greetings:

I watched the discussion on Old PRCo Route numbers hoping my un-asked
question would be answered.  If it was I missed it, so I'll ask now.

Both lists showed three routes visiting Mt. Washington:

33	Mt. Washington-West End		1933
40	Mt. Washington
41	Shiloh


and from Bion J. Arnold, Report 


 206	Mt. Washington via West End
 213	Mt. Washington via Tunnel
 213A	Shiloh St., Mt. Washington

The first two routes in each list are clear.  What is that Shiloh St. route?
I never saw a mention of it and I can't locate it on the Museum map.

Thanks.

Bob