Thereupon
Pronunciation : There`up*on"
Part of Speech : adv.
Definition : 1. Upon that or this; thereon. "They shall feed thereupon." Zeph. ii. 7.
2. On account, or in consequence, of that; therefore. [He] hopes to find you forward, . . . And thereupon he sends you this good news. Shak.
3. Immediately; at once; without delay.
Source : Webster's Unabridged Dictionary, 1913