Sent A.E. Boycott to K. Pearson, 21st Nov. 1927.
21 Nov 1927
Description:

‘Dear Professor Pearson,

As far as I can make out, your specimen is one of phosphatic calculi in a diventiculum of the bladder which has arisen either as a developmental anomaly or as the result of inflammation. Cystitis is I believe not uncommon in dogs.

Given a diverticulum of this kind with a narrow neck, stones would nearly always ensue. How to prevent inflammation I do not know but abundant water to drink is an obvious suggestion & McCarrison[?] has just noticed that an addition of milk to the diet prevents the formation of phosphate calculi in laboratory rats.

Yours sincerely,

A.E. Baycott.’