This lettering for the cover of Dag Hammarskjold 's _Markings_ is apparently based on Eric Gill's _Alphabet Stone_, A Roman alphabet, 1927 revised 1938. Here is a version carved on Hoptonwood stone,at Piggotts, North Dean, Buckingham, England, 1938.

Another version https://repository.library.brown.edu/studio/item/bdr:401545/
Don

Eric Gill's documentation about Alphabet stone [Roman alphabet carved on Hoptonwood stone] http://www.worldcat.org/title/alphabet-stone-roman-alphabet-carved-on-ho...
Abstract:
---start quote--
Engraved by Eric Gill (1882-1940), the work was commissioned by the New York printer George Grady (1885-1956) for the library in his home in Stamford, Connecticut. The New York calligrapher Paul Standard served as Grady's contact with Gill, after Grady had seen a similar Gill alphabet stone in an exhibition, English present-day calligraphy and illumination, organized by Standard and on view in New York in February 1938. The London firm Sculpture and Memorials acted as Gill's agent for the commission. Accompanying the stone is a note from Gill stating: "I cut this A.B.C. on July 1st & 2nd 1938 on HoptonWood Stone for Mr. Grady. The colouring was done by Michael Richey." The stone is signed and dated in the lower right corner, with Gill's monogram [EG 1938]; it arrived in New York in January 1939.

The original shipping and customs documents were acquired with the stone. Grady's correspondence with Paul Standard, George T. Friend, Eric Gill, and the London firm Sculpture and Memorials regarding the commission was donated later by John C. Grady.
---end quote--
Don

A reprint from 1963 is perhaps available from The Caxton Club http://www.caxtonclub.org/publications.html and http://www.caxtonclub.org/order.html
Don

Eric Gill used some similar ideas in Perpetua http://www.myfonts.com/fonts/mti/perpetua/ but its much coarser.
Don