65 Harley St <1>
Friday
Dear Sir
If you have time tomorrow evening before your party to step in here about ½ past 7 or 8 o’clock, I am going to show some of the effects of the polarising microscope <2> to Professor Johnstone Wheatstone <3> and 1 or 2 others and should be very happy to see you.
Believe me Yours most truly
H. F. Talbot
Notes:
1. Harley Street, London.
2. WHFT’s method of placing one polarizer close to the eyepiece and another below the stage increased the contrast between the subject and the background, providing him with a better method of investigating the internal structures of crystals.
3. Possibly James Johnstone (1806–1869), physician, and Sir Charles Wheatstone (1802–1875), scientist.