[London,] 30 December 1889 

Dear Kugelmann, 

A Happy New Year to you. 

Thank you for the prescription for my eyes, which, however, is not 
nearly concentrated enough for me. Last year and up till August I used 
cocaine and, as this grew less effective (on account of habituation), went 
on to ZnCl’, which works very well. If I weather the present short days 
successfully—the last daylight we saw was on 28 December—since 
yesterday morning it has been perpetual night—I shall have put the 
worst behind me. 

Kindest regards. 

Your 
EE.