How does Lytton Strachey use imagery in Eminent Victorians?

Imagery:

“Everyone agreed that General Gordon had been avenged at last. Who could doubt it? General Gordon himself, possibly, fluttering, in some remote Nirvana, the pages of a phantasmal Bible, might have ventured on a satirical remark. But General Gordon had always been a contradictious person—even a little off his head, perhaps, though a hero; and besides, he was no longer there to contradict… At any rate, it had all ended very happily—in a glorious slaughter of 20,000 Arabs, a vast addition to the British Empire, and a step in the Peerage for Sir Evelyn Baring.”

Rule number one: The Game is secret. But I listened and, once or twice when temptation drove me and the coast was clear, I peeked inside the box. This is what I learned. The Game was old. They'd been playing it for years. No, not playing. That is the wrong verb. Living; they had been living The Game for years. For The Game was more than its name suggested. It was a complex fantasy, an alternate world into which they escaped. There were no costumes, no swords, no feathered headdresses. Nothing that would have marked it as a game. For that was its nature. It was secret. Its only accoutrement was the box. A black lacquered case brought back from China by one of their ancestors; one of the spoils from a spree of exploration and plunder. It was the size of a square hatbox- not too big and not too small- and its lid was inlaid with semiprecious gems to form a scene: a river with a bridge across it, a small temple on one bank, a willow weeping from the sloping shore. Three figures stood atop the bridge and above them a lone bird circled. They guarded the box jealously, filled as it was with everything material to The Game. For although The Game demanded a good deal of running and hiding and wrestling, its real pleasure was enjoyed elsewhere. Rule number two: all journeys, adventures, explorations and sightings must be recorded.