Ger, are you sure those # 3-5 are from Audubon Drive???
I always believed they were from the first week of June 1956 in Los Angeles after reading the 1956 magazine Elvis Presley which has 14 of those pix along with a story about Elvis flying from Oakland to Los Angeles and the rehearsal of the Milton Berle show.
Those pix are from same day where Elvis is sitting by a desk reading a lot of fan mail. Judy Spreckles is standing beside him in at least one of those pix. The letters are adressed to Elvis Presley c/o Al Jarvis, Hollywood 27, Calif.
The letters came in boxes from Fronter Foods Corp in Los Angeles, Calif.
Another pic from same date is Elvis sitting a a dinner table (see below) reading a newspaper. In the pic are Gene Smith, Tom Diskin and Bitsy Mott as well as some girl and Judy Spreckles in same clothes as on the photo with the letters. Elvis is wearing different clothes in the dinner table photo.
So I strongly believe that those pix are from early June 1956 out in L.A.