Short answers, pulled from the story.
The Divan-i Shams-i Tabrizi is a large collection of poetry by Rumi containing more than 44,000 lines of verse. It stands as a testament to the transformation of a conventional Islamic jurist into an ecstatic mystic after meeting Shams-i Tabrizi.
Rumi wrote the majority of the Divan-i Shams-i Tabrizi in the immediate aftermath of Shams-i Tabrizi's second disappearance in 1248. Many poems date from around 1247 and the years that followed until Rumi overcame his grief.
Rumi signed a third of the poems in the Divan-i Shams-i Tabrizi with the name of his lost teacher or as Khâmush meaning Silence to dissolve the duality between the lover and the beloved. This choice was a philosophical statement repudiating the longing that plagued him after Shams-i Tabrizi's disappearance.
The Divan-i Shams-i Tabrizi contains 3,229 ghazals written in fifty-five different meters. The collection also includes 44 tarji-bands and 1,983 quatrains for a total of 44,292 lines.
Badi al-Zaman Foruzanfar published a critical edition of the Divan-i Shams-i Tabrizi in 1957 based upon manuscripts written within a hundred years of Rumi's death. This edition established the most authoritative version of the text available today.