I don't think/believe he was looking for one, nor that he found one.
Oh, he certainly returned to the scene and he collected the Pargeter silencer ('SBJ/1'), because police documented it as having been seized on that first morning...
I think he seized the silencer ('SBJ/1') belonging to Pargeters rifle because there may have been 'a blob of blood on the end of its cap' near to the .22 aperture, consistent with the diagram at the lab' on 13th August 1985, showing such an area of dried blood, which contradicted red paint from the kitchen aga on the end of the guns barrel...
Now, it becomes somewhat obvious even to a blind man that this silencer ('SBJ/1') must have been returnee to the farmhouse oprior to the 10th August 1985, when wo and be told David Boutflour rediscovered 'it', inside the gun cupboard of the den - the silencer in question was then placed in storage at the Eaton household until evening of 12th August 1985, when Peter Eaton handed 'it' back into 'Stan' Jones posssession. Thereafter, 'Stan' Jones showed 'it' to DI 'Bob' MIller on the following morning, who in turn told 'Stan' to give the silencer to 'Ron' Cook who was intending to visit the lab' later that same date. Of course, When 'Stan' Jones handed 'it' to 'Ron' Cook, Cook automatically assumed that 'Stan' was handing him the silencer he had seized from the scene on the first morning of the police investigation...
Lets get the facts right, 'Ron' Cook thought that 'Stan' Jones was the finder (the person who seized it at the scene on 7th August 1985) of 'that' silencer, and he duly attached an exhibit label which 'Ron' labelled 'SJ/1' because he did not know by that stage that 'Stan' JOnes had a middle Christian name of 'Brian'...
This detail would come back to haunt Essex police, because 'Ron' Cook signed that exhibit lable along with Glynis Howard at positions 2 and 3 on the aforementioned exhibit label leaving position 1 vacant intending to get 'Stan' Jones to sign 'it' at position 1 later on, because 'Ron' Cook knew that 'Stan' the man had seized it originally...
However, if you examine 'that' exhgibit label, whioch Cook and Howard both signed, we find that the gun dealor (RADCLIFFE) from Colchester, actually signs that exhibit label as the finder of 'that' silencer...
It beggars belief that 'RADCLIFFE' could be said to be the finder of 'that' silencer irrespective of whether or not, it was being referred to as exhibit 'SBJ/1' or 'SJ/1', or whatever...
'Stan' JO0nes tampered with his notebook entries in which he recorded all features and aspects of his involvement in this investigation - anyone who chooses to ignore this fact must be considered to have dishonest intentions...