Presents list, February 4, 1892

Allow me to begin by recording the valuable help I have experienced throughout the present enquiry from my assistant, Mr. Edward Russell, F. C. S. We have both put our shoulders to the wheel, and have gone together through the great number of calculations the work entailed. I am much indebted to Mr. Russell for the pains be has taken, and the accuracy of his judgment whenever a knotty point had to be met and overcome.