Nov. 20th 1854
I beg to inform you that the cause respecting my Photographic patent, which could not be tried for want of time before the long Vacation will come on for trial in the Common Pleas in about 3 weeks time You were kind enough to say you would assist me with your valuable testimony to the scientific merits and novelty of that invention
As my solicitor is now engaged in taking down the Evidence of the witnesses for the instruction of Counsel he is very desirous of knowing the particulars of the evidence with which you will favor me. But as I have suggested to him that you are probably much engaged and could not conveniently call on him at his chambers in Lincolns Inn, he proposes if that be the case, to wait upon you at the Tower in Company with myself at any hour you will name on Thursday or Saturday next.
Hoping that this will not be inconvenient to you
I remain Dr Sir Yours very Truly
H. Fox Talbot
W. T. Brande Esq