Arethusa by F. Marion Crawford

A month had passed, and yet, to all outward appearance, Zeno's manner of living had undergone no change. He rose early and bathed in the Golden Horn on fine days. He attended to his business in the morning, and dined with Sebastian Polo twice a week, but generally at home on the remaining days; and he rode out in the afternoon with a single running footman, or stayed indoors if it rained. Even his own servants and slaves hardly noticed any change in his habits, and only observed that he often looked preoccupied, and sometimes sat on his balcony for an hour without moving, his eyes fixed on the towers of the Blachernae palace.

They did not know how much time he spent with his beautiful Greek slave; and they found that the two little maids, Yulia and Lucilla, were not inclined to gossip when they came downstairs on an errand. Omobono probably knew a good deal, but he kept it to himself, and stored the fruits of his lively curiosity to enjoy alone the delicious sensation of the miser gloating over his useless gold. On the whole, therefore, life in the Venetian merchant's house had gone on much as usual for a whole month after Zoe had fired a train which was destined to produce momentous results when it reached the mine at last.