Michele 
This booklet, "Cartophilic Reference Book - No.4 : The Cigarette Card Issues of Gallaher Ltd. - An Official Checklist Compiled by A Committee of the Cartophilic Society of Great Britain Limited" (or RB.4), was edited by Eric Gurd, and signed off in February 1944.
It was then printed, by Parker Brothers, of St. Albans, in Hertfordshire, as a booklet of forty pages, but with no illustrations - and published as a limited edition of four hundred copies, in 1944, to be retailed, to Society members, at five shillings.
Like all our individual reference booklets, it was superseded by The World Tobacco Issues Index (RB.21), which was issued in 1956.
We know, however, that in 1964, when the Camer Club merged with the Cartophilic Society, this was not amongst the books listed as part of a half price offer, so that former Camericans, and new members, could buy one. And that means that this particular volume was already out of stock.
There are a couple of interesting and unusual facts about this work.
Firstly it was the first book to be issued with the word "Limited" after our name.
Secondly, looking at the dates it appears that there was quite a gap between the issue of RB.3 (in 1942) and this volume (in 1944), but by the time it was issued, books RB.5 (Abdulla, Adkin and Anstie) and RB.6 (Ardath) had already appeared, both being issued in 1943. This actually explains why on the inside of the back cover of the Gallaher, supposed fourth, book there is a list of the titles of the first seven volumes, under the heading of "The Cigarette Card Collector's Encyclopaedia". However, this does not explain why the booklet on Abdulla, Adkin and Anstie was not issued as RB.4 and the Ardath as RB.5.
The Gallaher booklet returned to the same format as the original two, having, on the inside cover, the quote from Thackeray "Here is the best I can do . . . I stand by this book, and am willing to leave it where I go, as my card.", followed by an Editor's Introduction telling a brief version of the story of Tom Gallaher and his tobacco company. It closes with the date [February, 1944] and Editor's initials, E.G. [Eric Gurd]
That list also gives the prices of the books at that time, which I repeat for the benefit of anyone who cannot read the text above, for whatever reason. RB.1 W & F Faulkner was given as 1/3d., RB.2 R & J Hill as 2/6d., RB.3 W.D. & H.O. Wills as 3/6d., this RB.4 Gallaher Ltd as 3/9d., RB.5 Abdulla, Adkin, and Anstie, in one volume as 2/6d., and RB.6 Ardath Tobacco Co. at 3/-. Book No.7, W.D. & H.O. Wills (Part 2) was also listed, as being "in active preparation". All editions were cited as being "numbered and limited to 400 copies".
It was an immediate success, and was out of print by 1950. Many years passed until a new reprint was produced; the decision was made to redo the cover into a plainer green format, but all the interior text remains the same.
[LIBRARY CODE G.06]