From Mike based on documents
According to the current explanation, David Boutflour found the sound moderator on the 10th August 1975, it was taken away and placed in storage at Ann and Peter Eaton's house until the evening of the 12th August 1985, when DS Jones collected it. On the following day (or so the story goes) Jones showed the moderator to PI 'Bob' Miller, who told Jones to give the moderator to Cook who was due to visit Huntingdon Lab' that same date! Cook took the sound moderator to the Lab' that date, and 'it' was provisionally examined by Glynis Howard that same date, and returned to Cook afterwards! Cook supposedly retained possession of 'it' by keeping it in his jacket pocket for the next 17 days (can you believe such bullshit?)! Cook fingerprinted 'it' by using the oblique light test system on the 15th August 1985, and by cyanoacrylate fumes (Superglue treatment) on the 23rd August 1985! Then, on the 29th August 1985, Cook took it upon himself to dismantle the sound moderator, removing it's baffle plates, without reporting a presence of any blood at all on any internal baffle plate on 'that' occasion! Cook rebuilds the silencer' and screws 'it' directly onto the external thread on the end of the anshuzt rifles barrel! On the following day (30th August 1985), the sound moderator gets sent to Huntingdon Lab' where it remains for 13 days until the prosecution's ballistic expert (Malcolm Fletcher) supposedly dismantled 'it' and discovered the all important blood flake belonging to Sheila Caffell! On that very same date, Fletcher hands the moderator and the flake of blood he maintains was found inside the moderator, over to blood expert, John Hayward, who proceeds to analyse the blood over the following 8 days!
So this misses the initial swabbing but the next bit seems to tie up . So it was the second flake of blood that was found that hayward had to test ? The initial swab was to confirm human blood .
I think the entry on 11 th sept was the family calling to find out why they had not been told anything about the blood ?