Does anyone know where I could find ads written by Gary Halbert?

I only know of two offhand.... There's Gary's personal ad, read it here....

An early (and quite famous) Gary Halbert ad is the "Nancy letter" - which was marketed to a PHONE BOOK list.... read it here....

Does anyone know where I can find more examples of Gary Halbert's ads and sales letters - either online or in print?

Thanks!

- Dien Rice