Summarize the following poem: Because I have seen Bengal’s face I will seek no more; The world has not anything more beautiful to show me. Waking up in darkness, gazing at the fig-tree, I behold Dawn’s swallows roosting under huge umbrella–like leaves. I look around me And discover a leafy dome-Jam, Kanthal, Bat, Hijol and Aswatha trees– All in a hush, shadowing clumps of cactus and zedoary bushes. When long, long ago, Chand came in his honeycombed boat To a blue Hijol, Bat and Tamal shade near the Champa, he too sighted Bengal’s incomparable beauty. One day, alas. In the Ganguri, on a raft, as the waning moon sank on the river’s sandbanks.