Along with symbols of death, Victorian cemeteries such as Nunhead are rich with references to eternal life. Even the downturned torch includes this: while it alludes to life being snuffed out, in fact the flame still burns.
Less ambiguous symbols include the circle, as a shape without beginning or end. It often appears in the form of an wreath, with evergreen foliage reinforcing the message. More emphatic still is this laurel wreath, since laurel is a symbol of the resurrection.
That wreath is a mixture, then, of pagan and christian symbolism (the banner reads 'Thy will be done'). However, the fashion for all things Egyptian and a desire to avoid religious controversy saw some defiantly unchristian symbols such as the obelisk, another representative of eternal life. According to legend, its pointy top also stopped the devil reclining on the grave.
On a smaller scale, ivy often appears on graves: it is evergreen; its clinging nature was compared to humanity's need for divine support; and its ability to survive on dead wood suggested the immortal soul surviving after the body had died.
In Nunhead, the references to eternal life are almost all specifically christian. However, there is something very Victorian about the way that they are made using a wide range of symbols, many very pagan indeed.