Final answer:
There is no direct reference in the provided material to the communication between Robert and the narrator's wife, but literature often depicts long-distance communication through letters, telegrams, or digital means, contingent on the story's setting and timeframe.
Step-by-step explanation:
The question seems to refer to the characters in a literary text, exploring the communication between Robert and the narrator's wife over a separation period.
However, the provided reference material does not directly link to this context and thus, does not allow for a factually accurate answer regarding their specific means of communication. Instead, the material available discusses power dynamics in marital relationships, as demonstrated in works like "Husbands and Wives
The Dynamics of Married Living" by Blood, Robert Jr. and Donald Wolfe, which explores how husbands and wives interact within their marriage.
More generally in literature, communication over long separations can often happen through letters, telegrams, or, in contemporary settings, digital means such as emails or social media. Relationships and communication in literature are complex themes that can be analyzed and interpreted based on character actions, societal norms, and the specific conditions set by the author within the narrative.