Journal of the Staple Inn Actuarial Society: Volume 1 -

A Note on the Normal Curve of Error and the Average Deviation
Published online by Cambridge University Press:

27 November 2014, pp. 44-50
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In the discussion that followed the reading of a paper on graduation A. Henry gave the following proof which leads to the equation for the “Normal Curve of Error” (A) and to an expression for the average deviation (irrespective of sign) from the most probable result (B).
Let the probability of the happening of a certain event be p and that of its failing q. Then in n trials the most probable number of occasions on which the event will happen will be np.

Suggested Course of Reading for Students Preparing for Part III. of the Official Syllabus
Published online by Cambridge University Press:

27 November 2014, pp. 51-53
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Actuarial students who have passed their second examination and wish to study the more practical part of their work, frequently have difficulty in deciding the most suitable books and papers to read, and consequently do little work by themselves and rely perhaps more than is necessary on the advice given them by tutors.
Although the present suggestions of preliminary reading are not meant to eliminate the assistance of a tutor, which is in many cases indispensable, they might be sufficient from an examination point of view for those who have a considerable amount of practical experience.

British Actuarial Journal