Many years ago, I once asked what the Akashic Records were. By the guiding magnetic force of my Innermost, I was taken through outer space past the whirling stars into a managerial office, where a secretary sat waiting for me to ask her what I wanted to know.
I was stunned by this simple symbol, and only later did I realize that the Akashic Records are literally that: the storehouse of psychic memories of this planet earth, as well as other worlds. We can view the history of our earth, its different root races and the humanities who populated it, through living films, scenarios played out palpably upon the screen of the Astral Light. All we need to do is ask our internal secretary (our Innermost) to show us what we would like to know.
As for a lecture that specifically covers this topic, I am uncertain. But in terms of a chapter from a book, you can read the following reference below.
Joyful in hope, suffering in tribulation, be thou constant in thy prayer.
Benedictis, qui venit in nomine Domini. Osanna in excelsis.
"Blessed is he who comes in the name of the Lord. Hosanna in the highest!"