Final answer:
The poem written by Edgar as an ode to his late wife is 'Elegy Written in a Country Churchyard'.
Step-by-step explanation:
The poem written by Edgar in ode to his late wife is Elegy Written in a Country Churchyard. This poem is a somber reflection on mortality and the passing of time. It is a tribute to the common people buried in the churchyard and contemplates the significance of their lives.