+0
Respected teachers,

Could you please help me understand the two sentences in red? Emotion: smile Thanks in advance

Many years ago, on my way from Hongkong to New York, I passed a week in San Francisco. A long time had gone by since I had been in that city, during which my ventures in the Orient had prospered beyond my hope; I was rich and could afford to revisit my own country to renew my friendship with such of the companions of my youth as still lived and remembered me with the old affection. Chief of these, I hoped, was Mohun Dampier, an old schoolmate with whom I had held a desultory correspondence which had long ceased, as is the way of correspondence between men. You may have observed that the indisposition to write a merely social letter is in the ratio of the square of the distance between you and your correspondent. It is a law.
+0
.
Chief of these, I hoped, was Mohun Dampier, an old schoolmate with whom I had held a desultory correspondence which had long ceased, as is the way of correspondence between men. You may have observed that the indisposition to write a merely social letter is in the ratio of the square of the distance between you and your correspondent.

equals

I hoped to renew my friendship with Mohun Dampier. We had stopped writing to each other, as men often do. The farther apart two men are, the less they feel like writing to each other.
.
Comments  
Mr. Mechawber, thanks a lot.

About the letter, that is so true, it happened to me with two of my friends. We're no longer friends. That is law. Emotion: sad