As one put drunk into the Packet-boat,
Tom May was hurry'd hence and did not know't.
But was amaz'd on the Elysian side,
And with an Eye uncertain, gazing wide,
Could not determine in what place he was,
For whence in Stevens ally Trees or Grass.
Nor where the Popes head, nor the Mitre lay,
Signs by which still he found and lost his way.
The conceit here is that Tom May is compared to a drunk hurried hence– as in, to death. After this death, he cannot tell in which place he is– either the good place (heaven) or the bad place (hell). Marvell is firmly of the opinion that May is in the bad place, as the poem concludes with images of the Ancient Greek afterlife. 

Tom Mays Death