I have received a pair of notes concerning Fellowship Parkway. The first is from Richard Cromelin, pop music writer from the L.A. Times. Cromelin writes:

It must have been late 60s or early 70s, and I cant remember the reason for the
correspondence, but I got a letter from the Firesign Theater guys with a Fellowship Parkway address on their return label. It's an otherworldly place all right. I see Google Maps just has a big gray area where it should be....

The second note is from Diane Edwardson, who also mentions maps. Edwardson is a longtime community activist and a 16-year resident of what she describes as "the border between Echo Park and Silver Lake." She says that Fellowship Parkway is not part of the Semi-Tropic Spiritualists’ Tract (as my previous post claimed it was).

Edwardson writes:

The Semi-Tropic Spiritualists’ Tract (where the Landacre Cabin is a historic landmark) is the last hillside in Elysian Heights. It is a City Tract cut in 1905 by the Semi-Tropic Spiritualists between Sunflower Ave and Walcott Way (northeast of Whitmore). The site was recently under the gun of a developer who wanted to destroy the lush hillside by cutting and grading similar to developments in Simi Valley and Orange County. (He’s currently redesigning his plans.)

Fellowship Parkway is a separate tract founded by yet another of Echo Park's many religious sects in the early part of the 20th Century. It should not be confused with the Holyland Exhibition at the corner of Allesandro Way and Lake View Ave across the 2 Frwy. (Also worth a visit – they have a great collection of historic photos of the neighborhood since 1922.)

It seems cartography in the Echo gets curiouser and curiouser, especially where religion is involved.