Your source is Mark Lane's "Rush to Judgment, P37.
Mark Lane is a conspiracy theorist, and his count is biased in that regard.
Another conspiracy theorist, Stewart Galanor, has his own count, and gets these numbers in his book,
Cover-Up:
Not Asked: 32%
Grassy Knoll: 37%
Depository: 32%
Could Not Tell: 24%
TSBD & GK: 4%
Someplace Else: 3%
The HSCA in 1978, however, did an independent count of the witnesses, counted 178 witnesses, and categorized them this way:
Grassy Knoll : 11%
Depository: 27%
Unsure: 44%
Somewhere Else: 17%
While some of the witnesses we may wrangle with*, the HSCA count is the least biased in my opinion and the most thorough. Note the 'Somewhere Else' total is larger than the grassy knoll total.
Mark Lane's list is incomplete and clearly biased in favor of the Grassy Knoll (he was, after all, trying to sell a book).
Your point here is meaningless. Even one of your own witnesses (you brought up Lee Bowers a few weeks ago) admitted during his testimony he could not tell where the shots were coming from because of the reverberation.
Mr. BALL - Can you tell me now whether or not it came, the sounds you heard, the three shots came from the direction of the Depository Building or the triple underpass?
Mr. BOWERS - No; I could not.
Mr. BALL - From your experience there, previous experience there in hearing sounds that originated at the Texas School Book Depository Building, did you notice that sometimes those sounds seem to come from the triple underpass? Is that what you told me a moment ago?
Mr. BOWERS - There is a similarity of sound, because there is a reverberation which takes place from either location.
http://jfkassassination.net/russ/testimony/bowers.htm
One more related point: The vast majority of witnesses (156 of 169 who reported a shot count, according to the HSCA) reported three shots or FEWER. That uniformity is hard to ignore. Unless your theory accounts for this by counting only three shots, the majority of the witnesses dispute your account.
Hank
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* For example John McAdams - a 'lone-nutter' - counts James Crawford as a knoll witness because his impression of the first shot was it was a motorcycle backfire from down the hill, but Crawford started looking around, and by the third shot, starting looking up for the source of the sound. Just after the third shot, he caught a fleeting glimpse of movement in the sniper's nest window, and believed what he saw was a person moving away from that window. Still not certain he heard shots (as opposed to firecrackers, for example) he turned to his co-worker, Mary Ann Mitchell, and said, "If those were shots, they came from that window" (pointing at the sniper's nest window). I personally count Crawford as a TSBD witness because while his first impression was a backfire from 'down the hill', he concluded that was wrong during the shooting, and identified the Depository 6th floor window as the source of the shots within seconds of the final shot.
http://jfkassassination.net/russ/testimony/crawford.htm
John McAdams list of witnesses and how he classifies them is here:
http://mcadams.posc.mu.edu/earwitnesses.htm