From Pat Deveney's database:
The Centre practiced daily "withdrawal into the Silence, and a twice monthly concentration (simultaneous with the meeting of the Mother Circle)," and would send private instructions to members on request. Pincock had earlier written Trails of Truth, her verbatim account of seances with the independent voice medium William Cartheuser, and the first issue of the journal, called the "William Cartheuser Series" on "Healing and Self-Unfoldment," was written (and copyrighted) by him. Cartheuser's earlier success before the A.S.P.R. in 1926 was somewhat dimmed when one of his communicating spirits was found to be alive. Pincock broke with the journal in 1935 after realizing that Cartheuser's mediumship was fraudulent. Skidmore Library, Lily Dale.
|Issues:||Progression V1 N1 1932 and an alternative version|
|Progression V2 N7 No Date|
|Progression V5 Lesson 20 1937 Aug-Nov|
|Progression V5 Lesson 20 1938 Feb|