[The Australian Panther]

'The 39 steps' 'first appeared as a serial in Blackwood's Magazine, credited to “H de V.”, in July, August and September 1915 before being published in book form in October that year by William Blackwood and Sons"
So it jars om this version, on CB+ page 8, that Scudder says,"I came across a plot to start a 'third world war' in 10 days." This has to be a revision. I can't find a date of original publication on the comic or the CB+ entry, but it is probably post WWII.
As for the art, his anatomy and faces are not work of genius, but at least he draws hands and feet and many contemporary artists try to avoid that if possible.
His layouts haven't much energy but they work to tell the story well.
Not that you can go too far wrong with that story.
Cheers!

Link to the book: Stories By Famous Authors Illustrated 04 - The 39 Steps

[Robb_K]

'The 39 steps' 'first appeared as a serial in Blackwood's Magazine, credited to ?H de V.?, in July, August and September 1915 before being published in book form in October that year by William Blackwood and Sons"
So it jars om this version, on CB+ page 8, that Scudder says,"I came across a plot to start a 'third world war' in 10 days." This has to be a revision.

What does the phrase "jars om" mean in modern Standard English?  Is it a Scots idiomatic phrase?  Generally, I can get the gist of most Scots phrases, because they contain Old English words that are still used in Dutch and Frisian.  "om" means "about" in both those languages.  So does that mean that the sentence "I came across a plot to start a 'third world war' in 10 days." rattles the reader's attention, because it seems out of context?

[The Australian Panther]

At my age, I tend to need an editor, I usually preview my posts but, when in a hurry, sometimes,  to my embarrassment, I miss an error.
I meant to write, So, it jars on [should have been 'in'] this version.
that is, 'so, it jars in this version'
This meaning intended:-

4. verb
If something jars on you, you find it unpleasant, disturbing, or shocking.
Sometimes a light remark jarred on her father. [VERB + on]
...televised congressional hearings that jarred the nation's faith in the presidency. [VERB noun]
You shouldn't have too many colours in a small space as the effect can jar. [VERB]
jarring adjective
In the context of this chapter, Dore's comments strike a jarring note.

And, no I not a Scot, although I have Scots in my ancestry. 
In any case, I would have thought the context made the point obvious.
To put it in other words, 'It stood out that the comment about world war 3 would have been unlikely in the original text.'

So does that mean that the sentence "I came across a plot to start a 'third world war' in 10 days." rattles the reader's attention, because it seems out of context?

Exactly!
cheers!       
 

[Robb_K]

At my age, I tend to need an editor, I usually preview my posts but, when in a hurry, sometimes,  to my embarrassment, I miss an error.
I meant to write, So, it jars on [should have been 'in'] this version.
that is, 'so, it jars in this version'
This meaning intended:-

4. verb
If something jars on you, you find it unpleasant, disturbing, or shocking.
Sometimes a light remark jarred on her father. [VERB + on]
...televised congressional hearings that jarred the nation's faith in the presidency. [VERB noun]
You shouldn't have too many colours in a small space as the effect can jar. [VERB]
jarring adjective
In the context of this chapter, Dore's comments strike a jarring note.

And, no I not a Scot, although I have Scots in my ancestry. 
In any case, I would have thought the context made the point obvious.
To put it in other words, 'It stood out that the comment about world war 3 would have been unlikely in the original text.'

So does that mean that the sentence "I came across a plot to start a 'third world war' in 10 days." rattles the reader's attention, because it seems out of context?

Exactly!
cheers!       

Of course, I know that usage of the verb, '"to jar".  My problem is rarely assuming typos, when it is not necessarily completely obvious that a typo was made, as I am used to coming across lots of regional differences in speech, especially on an international forum.  And several regional dialects in The UK still use Old English words that are still extant in Dutch and Frisian (especially Scots, Northumbrian, Yorkshire, and Jordy) as is the word "om" (about).  So, I was just checking to find out if that were the case with "om".  I am constantly discovering more and more Frisian words still being used in UK dialects.