Well, I have had to take a chance. I have searched the Magonia website and their list of books and I have trawled through every one of my books of folk-lore and so on. No "MacGregor" book from 1955.
The 1930 Tomintoul case seemed to have dead ends everywhere. I even searched through my huge stack of magazines and newsletters from the 1950s-1970. Nothing,
An internet search...nothing. But I was able to search a large internet archive reserved for researchers, or people with nothing better to do...only the 1937 The Peat -Fire Flame by Alasdair Alpin MacGregor, is listed and I already have a first edition copy of that.
There are a few books by A. A. MacGregor -none listed by Magonia. Only one was published in 1955 and that was The Ghost Book: Strange Hauntings in Britain by Alasdair Alpin MacGregor. Is this the reference to the report?
Well, it better be because I just purchased a copy from a contact -and I won't get my money back if it is not.
The whole point in citing references to a report is that it must be accessible to researchers to double check the details. As I have found IntCat lacking in accuracy in places I was NOT going to take what it read without double checking.
Ufologist on site after cite quotes this 1930 incident and 99% of them quote Jerome Clarks UFO Encyclopaedia. According to Jerome he was citing IntCat!! So he has asked me to up-date him when I find anything out. And I shall.
Look, it is simple. If you mention a case then the reference source is given. If that source is the same reference for the next report you simply write "ditto pp.----" (whatever the page numbers are. If the source is not used again until report 15 then (if it was the first reference source) you write "Ibid 1pp---" and the page numbers. It is that simple yet Rogerson and Magonia (who seem impossible to get hold of), critical of so many writers/researchers and sources do not abide by the first rule of research: always cite your reference".
This is why Ufology is never taken seriously. People like me have to come along and then correct sources and details.
It's been a bad day as I just read David Haisell's A Question Of Control and wait til you see my review on THAT!
Let's all blame Nandor Fodor.