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The site has been revamped and now the codebase of this page allows you to listen to audio files without downloading the audio file iteself.

What I have also done is coded the page to allow entire folders to be downloaded. The download link is to the right of folders inside each folder on the front page.

KEY: sc=physically scanned by me, HQ=High Quality

Email = info@lrhmaterials.com
Backup email in case you don't get a response within 2 days - cas@matrixfiles.com

Folder ..   
610309 — HCO Technical Advice Letter — Starting a Session [B001-019].pdf 610309 — HCO Technical Advice Letter — Starting a Session [B001-019].pdf 397KB Dec 20 2025 06:18:04 AM
610309 — HCO Technical Advice Letter — Starting a Session [TAL01-001].pdf 610309 — HCO Technical Advice Letter — Starting a Session [TAL01-001].pdf 510KB Dec 20 2025 06:18:02 AM
610322 — HCO Technical Advice Letter — SOP Goals Assessment - From Observation of LRH Doing a SOP Goals Assessment [B001-021].pdf 610322 — HCO Technical Advice Letter — SOP Goals Assessment - From Observation of LRH Doing a SOP Goals Assessment [B001-021].pdf 376KB Dec 20 2025 06:18:05 AM
610322 — HCO Technical Advice Letter — SOP Goals Assessment - From Observation of LRH Doing a SOP Goals Assessment [TAL01-002].pdf 610322 — HCO Technical Advice Letter — SOP Goals Assessment - From Observation of LRH Doing a SOP Goals Assessment [TAL01-002].pdf 435KB Dec 20 2025 06:18:01 AM
610519 — HCO Technical Advice Letter — Cancellation of HCO Continental Technical Letter of 23 Feb 61 Issued by Auckland, Entitled ''Auditor and ARC Breaks'' [TAL03-005].pdf 238KB Dec 20 2025 06:17:58 AM
610703 — HCO Technical Advice Letter — Curriculum [TAL03-006].pdf 610703 — HCO Technical Advice Letter — Curriculum [TAL03-006].pdf 42KB Dec 20 2025 06:17:59 AM
610703 — HCO Technical Advice Letter — Schedule [TAL03-007].pdf 610703 — HCO Technical Advice Letter — Schedule [TAL03-007].pdf 79KB Dec 20 2025 06:18:04 AM
610816 — HCO Technical Advice Letter — 'The following telex was received too late for inclusion...' [TAL03-008].pdf 610816 — HCO Technical Advice Letter — 'The following telex was received too late for inclusion...' [TAL03-008].pdf 75KB Dec 20 2025 06:18:05 AM
631121 — Technical Advice Letter — Data Taken from Recent LRH Lecture [TAL01-008].pdf 631121 — Technical Advice Letter — Data Taken from Recent LRH Lecture [TAL01-008].pdf 247KB Dec 20 2025 06:18:04 AM
631121 — Technical Advice Letter — Data Taken from Recent LRH Lecture [TAL02-001].pdf 631121 — Technical Advice Letter — Data Taken from Recent LRH Lecture [TAL02-001].pdf 238KB Dec 20 2025 06:18:04 AM
631206 — HCO Technical Advice Letter — Points from Recent LRH Lectures [TAL01-009].pdf 631206 — HCO Technical Advice Letter — Points from Recent LRH Lectures [TAL01-009].pdf 121KB Dec 20 2025 06:18:03 AM
640305 — HCO Technical Advice Letter — HAS Course Outline - Level One, An [TAL01-010].pdf 640305 — HCO Technical Advice Letter — HAS Course Outline - Level One, An [TAL01-010].pdf 1003KB Dec 20 2025 06:18:02 AM
640306 — HCO Technical Advice Letter — Auditing & Assessment - Basic Data - from Recent LRH Lectures (Feb 25 & March 3, 1964) [B040-005].pdf 640306 — HCO Technical Advice Letter — Auditing & Assessment - Basic Data - from Recent LRH Lectures (Feb 25 & March 3, 1964) [B040-005].pdf 276KB Dec 20 2025 06:18:03 AM
640306 — HCO Technical Advice Letter — Auditing & Assessment - Basic Data - from Recent LRH Lectures (Feb 25 & March 3, 1964) [TAL01-011].pdf 640306 — HCO Technical Advice Letter — Auditing & Assessment - Basic Data - from Recent LRH Lectures (Feb 25 & March 3, 1964) [TAL01-011].pdf 277KB Dec 20 2025 06:18:03 AM
640306 — HCO Technical Advice Letter — Points from LRH Lectures to the Saint Hill Staff Co-Audit [TAL01-012].pdf 640306 — HCO Technical Advice Letter — Points from LRH Lectures to the Saint Hill Staff Co-Audit [TAL01-012].pdf 93KB Dec 20 2025 06:18:04 AM
640407 — HCO Technical Advice Letter — Lower Levels Summary [TAL01-013].pdf 640407 — HCO Technical Advice Letter — Lower Levels Summary [TAL01-013].pdf 234KB Dec 20 2025 06:18:05 AM
640407 — HCO Technical Advice Letter — Truth and Reality - Case Progress at Level I-IV (Points from LRH Lecture of March 17, 1964) [TAL01-014].pdf 108KB Dec 20 2025 06:18:05 AM
640414 — HCO Technical Advice Letter — Intention [TAL01-015].pdf 640414 — HCO Technical Advice Letter — Intention [TAL01-015].pdf 123KB Dec 20 2025 06:17:59 AM
640415 — HCO Technical Advice Letter — Flattening Processes [TAL01-016].pdf 640415 — HCO Technical Advice Letter — Flattening Processes [TAL01-016].pdf 210KB Dec 20 2025 06:17:57 AM
640508 — HCO Technical Advice Letter — Auditor Listening [B004-013].pdf 640508 — HCO Technical Advice Letter — Auditor Listening [B004-013].pdf 100KB Dec 20 2025 06:18:02 AM
640508 — HCO Technical Advice Letter — Auditor Listening [TAL01-017].pdf 640508 — HCO Technical Advice Letter — Auditor Listening [TAL01-017].pdf 95KB Dec 20 2025 06:18:02 AM
640622 — HCO Technical Advice Letter — Disseminating Scientology [TAL01-018].pdf 640622 — HCO Technical Advice Letter — Disseminating Scientology [TAL01-018].pdf 350KB Dec 20 2025 06:17:58 AM
640630 — HCO Technical Advice Letter — Starting a Franchise Center [B040-017].pdf 640630 — HCO Technical Advice Letter — Starting a Franchise Center [B040-017].pdf 241KB Dec 20 2025 06:17:59 AM
640630 — HCO Technical Advice Letter — Starting a Franchise Center [TAL01-019].pdf 640630 — HCO Technical Advice Letter — Starting a Franchise Center [TAL01-019].pdf 239KB Dec 20 2025 06:17:58 AM
640717 — HCO Technical Advice Letter — Disseminating Scientology - Part 2 - Letter Writing [TAL01-020].pdf 640717 — HCO Technical Advice Letter — Disseminating Scientology - Part 2 - Letter Writing [TAL01-020].pdf 900KB Dec 20 2025 06:18:02 AM
680213 — Technical Advice Letter — Tech Affluence [TAL02-002].pdf 680213 — Technical Advice Letter — Tech Affluence [TAL02-002].pdf 62KB Dec 20 2025 06:18:05 AM
681017 — Technical Advice Letter — Vocabulary Sheet for HQS Course [TAL03-004].pdf 681017 — Technical Advice Letter — Vocabulary Sheet for HQS Course [TAL03-004].pdf 195KB Dec 20 2025 06:18:03 AM
700205 — HCO Technical Advice Letter — Dianetics Case Supervisors Internships [TAL03-002].pdf 700205 — HCO Technical Advice Letter — Dianetics Case Supervisors Internships [TAL03-002].pdf 138KB Dec 20 2025 06:17:57 AM
700509 — Technical Advice Letter — Heavy Traffic Warning [TAL03-001].pdf 700509 — Technical Advice Letter — Heavy Traffic Warning [TAL03-001].pdf 73KB Dec 20 2025 06:17:57 AM
700807 — Technical Advice Letter — Application of Two-Way Comm with Students [TAL03-003].pdf 700807 — Technical Advice Letter — Application of Two-Way Comm with Students [TAL03-003].pdf 199KB Dec 20 2025 06:17:59 AM
XXXXXX — Technical Advice Letter Attachment — Case Supervisor Instructions [TAL03-001].pdf XXXXXX — Technical Advice Letter Attachment — Case Supervisor Instructions [TAL03-001].pdf 41KB Dec 20 2025 06:18:03 AM
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