Cool, thanx...
How certain are you of the validity of these quotes?
Good question.
The same question would apply to the published writings continuously put out by White Estate. How reliable are they?
The answer is that the researchers have access to both published and unpublished writings to verify their validity.
The Center for Adventist Research is a branch office of White Estate and is the vault for unpublished letters and manuscripts. Similarly to how White Estate files these writings, they are indexed, organized by subjects in a vault which contains many originals handwritten and/or with her signatures as well as photocopies of the originals.
White Estate continues to index them in a database and make them available in electronic form. Since the release of this compilation (an Adventist Apocalypse), many of writings have been made available by whiteestate.org.
Because of the open access to the files, the accuracy of the publishing has improved over time. Here is an example on a published vision.
In the night I was, I thought, in a room but not in my own house. I was in a city, where I knew not, and I heard
expression after expression. I rose up quickly in bed, and saw from my window large balls of fire. Jetting out were sparks, in the form of arrows, and buildings were being consumed, and in a very few minutes the entire block of buildings was falling and the screeching and mournful groans came distinctly to my ears. ... {11MR 361.1}
After Jan Marcussen (I think) read the original handwriting, it was determined based on legibility they should be read '
explosion after explosion'. White Estate made the correction soon after. This was about 6-7 years ago.