It seems clear that no single extant work of antiquity can have supplied Keats with the suggestion for this poem. There exists, indeed, at Holland House an urn wrought with just such a scene of pastoral sacrifice as is described in his fourth stanza[58]: and of course no subject is commoner in Greek relief-sculpture than a Bacchanalian procession. But the two subjects do not, so far as I know, occur together on any single work of ancient art: and Keats probably imagined his urn by a combination of sculptures actually seen in the British Museum with others known to him only from engravings, and particularly from Piranesi's etchings. Lord Holland's urn is duly figured in the _Vasi e Candelabri_ of that admirable master. From the old Leigh Hunt days Keats had been fond of what he calls-- "the pleasant flow Of words at opening a portfolio:" and in the scene of sacrifice in _Endymion_ (Book L, 136-163) we may perhaps already find a proof of familiarity with this particular print, as well as an anticipation of the more masterly poetic rendering of the subject in the ode. The ode _On Indolence_ stands midway, not necessarily in date of composition, but in scope and feeling, between the two Greek and the two personal odes, as I have above distinguished them. In it Keats again calls up the image of a marble urn, but not for its own sake, only to illustrate the guise in which he feigns the allegoric presences of Love, Ambition, and Poetry to have appeared to him in a day-dream. This ode, less highly wrought and more unequal than the rest, contains the imaginative record of a passing mood (mentioned also in his correspondence) when the wonted intensity of his emotional life was suspended under the spell of an agreeable physical languor. Well had it been for him had such moods come more frequently to give him rest. Most sensitive among the sons of men, the sources of joy and pain lay close together in his nature: and unsatisfied passion kept both sources filled to bursting. One of the attributes he assigns to his enchantress Lamia is a "sciential brain To unperplex bliss from its neighbour pain." In the fragmentary ode _On Melancholy_ (which has no proper beginning, its first stanza having been discarded) he treats the theme of Beaumont and of Milton in a manner entirely his own: expressing his experience of the habitual interchange and alternation of emotions of joy and pain with a characteristic easy magnificence of imagery and style:-- "Aye, in the very Temple of Delight Veil'd Melancholy has her sovereign shrine, Though known to none save him whose strenuous tongue Can burst joy's grape against his palate fine: His soul shall taste the sadness of her might, And be among her cloudy trophies hung."