Dear colleagues,

I am (hopefully) approaching the final phase of 
my editorial work on the two Business Cycles 
volumes of The Collected Works of F. A. Hayek. 
May I turn to the list for help on two minor 
problems I have not been able to solve up to now? 
The first relates to a hitherto unpublished 
typescript by Hayek (“Geldtheoretische 
Untersuchungen”, that is, translated “Investigations into Monetary Theory”).
There Hayek writes (in my translation):

“It is well-known that the time moment … 
constitutes the most difficult problem to 
economic theory”, and places the following 
references in a footnote: “Cf. Edgeworth II 60; 
Marshall, 'Preface' to Principles 3 XV S. 103.”

The references to Marshall are most probably to 
“the element of time” in Principles of Economics, 
“Preface to the First Edition”, p. vii, and book 
III, chapter iv, § 5, p. 109 of the 9th variorum 
edition with annotations by C. W. Guillebaud 
(London: Macmillan, 1961). But I have not been 
able to make any sense of the Edgeworth reference.

Any suggestions will be highly appreciated.

My best thanks in advance.

Hansjoerg Klausinger

P.S. The second query follows in a separate mail.