William Barchard¹ to Faraday   11 April 1849²

Sir

In answer to your letter³ I have sent you these few observations as follows

1. There is constant air down from the top which returns from the ventilator but do not affect the lights.

2. The lights are most affected by foggy weather also by a S.W. wind.

3. The lights on both tiers has the same effect[.]

4. There is a stove in the lanthorn, the chimney is through the roof not into the cowl[.]

There is a door between the watch room & the tower also a door in the lanthorn to walk on the outside on the Gallery.

I remain | Yours &c | William Barchard

Mr Faraday