Electromagnetic force has an infinite range of interaction. It is considerably stronger than the gravitational and weak forces. The photon is the key particle of exchange for electromagnetic force. The Strong Nuclear Force The strong nuclear force operates over a very short range, but it is the strongest of the forces.
Thomas Holmes and Richard Rahe are 2 now famous psychiatrists who, in 1967, put forward the idea that there may be a link to stress and physical illness.
Watson describes Holmes and his methods in too romantic and sentimental a manner for Holmes' taste. In time, they become close friends. In The Sign of Four, John Watson met Mary Morstan, who became his wife.