Hello Russ:
Thank you for your thoughts on this Pfalz pilot mystery. The date and location you've offered are certainly viable, along with the plane type and the fact that the plane was vandalized by looters; but there remains the confound of the pilot's name.
Candidate Pilot Paul Vogel is at odds with the recollection of details offered by my informant, who has proven himself, on so many other points, to be a very "reliable witness"; so I feel obliged to pursue some variant closer to the name given as "KOCH", followed by either "Ernst or Erich", or, as he said: "something like that." (which could be some other 'E' name)
It's entirely possible my 104 year old informant may have corrupted some facts over time, shifting the name into some variant; but if that's so, then so too would the other details be amiss (plane type and all the details affiliated with that portion of the incident).
I knew my informant well enough to know that he'd be accurate the facts given in his detailed recollection. And in so far as we're both willing to "trust" him on the Pfalz, single seat fighter, portion of his memory, I'm willing to also trust the pilot's name he had given; or at least, some close variant.
As for the date, that the event was not included in my informant's own war diary, leaves me to conclude the plane crash had to occur prior to the commencement of his diary; otherwise, it would've been included in his diary. Thus, a viable window for the incident would be anywhere between August 20, 1917 (arrival in France) and June 23, 1918, (diary commencement).
Admittedly this a nebulous target window, but it's the best compass bearing I have from the facts to hand.
Concerning the location, as my informant was Canadian Corps, he was on the Arras Front; the place names he spoke of were bordered by: Bully-Grenay/Loos/Lens in the north, then south to Arras, Etrun, Roclincourt, and west to Tincques, La Comte and Bruay. This was the area of his Brigade's service, from Sept/17 to Aug/18; at which time, they temporarily shifted south to Amiens for the Battle of Amiens in August 1918 (for 2 weeks), then came back to Arras for the 'Last Hundred Days' push eastward, from Arras, through the D-Q Line to Valenciennes. So the location for the plane crash is rather narrow.
By the way, I did confer with the CEF 13th Brigade CFA War Diary, from August 1917 to June 1918, combing through in hopes of finding an entry regarding an "Enemy Aircraft" that crashed within their proximity... and found one! But, alas, not the right one...
The 13th Brigade CFA War Diary, dated Sept. 27, 1917, with a given location of Bully-Grenay, observed the following:
"Several of our balloons brought down this date, but Enemy plane forced to land in our lines. Weather fine & clear; Temp. 62 degrees." And from the brilliant work 'Casualties of the German Air Service' (by N. Franks. F. Bailey and R. Driven 1999, Grub Street, London p. 353) I was able to learn that the pilot was Obltn.
Hans Waldhausen, a pilot with Jasta 37, who came down near Souchez (near Vimy; square in the right location!), but this individual survived to be a POW.
Point being, this is evidence that the Brigade diarist would likely have recorded the other incident as well; but I have not been able to locate such an entry.
But if we return to Paul Vogel, as a candidate, I find that there is a discrepancy regarding his crash site; two print sources agree on name and date, but give different locations for the crash site. 'Above the Trenches' (C. Shores, N. Franks and R. Guest 1990, Run Street, London) gives "Recourt" as the crash site; a viable location, some 12kms east of Arras, while 'Casualties of the German Air Service' (authors as above) states the location as Fauberg-d'Amiens, which is 1 km west of Arras. Both locations are quite viable, but there is the inherent discrepancy of fact; suggesting the truth may now be well lost.
Meanwhile, there's the confound of date (being Sept. 1918); for given that my informant was keeping his diary by then, and fails to make any mention of the incident, I suspect this date is too late. And coupled with the name "Vogel" being so very different from what my informant recalled, I feel the likelihood that Vogel is the pilot is slim.
All in all, its a vexing head scratch, in so many ways, and I doubt I'll ever 'nail down' the truth; and so, will probably have to concede defeat on this one.
But thank you so much for giving it a go, and being a trooper by offering your own idea; your efforts are much appreciated!
cheers to you,
jojo