Tagore tries to converse with all of his readers through this poem. Tagore’s poem talks about time and old age. The voice of the poem is an old man whose audience is of a younger group. The use of apostrophe brings us closer to the old man. Instead of being just an audience, we become part of the poem or its receiver. We are told in everything we see today has its own history and beauty. The entire poem becomes timeless, as the receiver can be anyone at any age.
The fragment contains the verb (sank) as well as how and where (something) sank. The missing fragment would contain the NP as it would share the noun and what actually sank.