Are people buried under Primrose Hill? And was Blackheath used to bury victoms of the plague?

Someone keeps telling me Primrose Hill is a burial mound. I do not believe this but would like proof (other then Wikipedia) I also found out that the burial of plague victoms is a myth - anyone know or can point to references so I can prove my points?

Are people buried under Primrose Hill? And was Blackheath used to bury victoms of the plague?
Primrose Hill (see link 1)





As the Green Park forms a sort of supplement and appendage to St. James's Park, so does Primrose Hill to the Regent's Park: it has the character of a "park for the people," and its associations are the reverse of aristocratic. The hill lies on the north side of the park, and its name still bears testimony to its rural and retired situation, when its sides were covered with brushwood and an undergrowth of early spring flowers. Going back to the time of the Roman settlers, we find that when they planted their colony on the banks of the Thames and founded London, most part of the northern district consisted of a large forest filled with wolves and other wild animals. Early in the thirteenth century the forest of Middlesex was disafforested, but although portions were cleared, St. John's Wood, as we have already seen, remained sufficiently dense in Queen Elizabeth's reign to afford shelter and concealment to Babington, the conspirator, and his associates. At that time, however, the slopes of Primrose Hill were used as meadow land, and were probably in the mind of writers who allude to the many "haicockes in July at Pancredge" (St. Pancras), as a thing known to everybody. This district dates back to very early times, if we may accept the name of Barrow Hill—formerly Greenberry Hill—which lies on its western side, as evidence that it was once the scene of a battle and place of sepulture for the slain. There was formerly a Barrow Farm, and Barrow Hill itself is now occupied by the reservoir of the West Middlesex Waterworks. The name survives in Barrow Hill Place and Road.





Blackheath (see link 2)





Blackheath was so called because it appeared a darker colour than the green fields beside the Thames which it overlooked - the soil was dark and so were the plants which grew there. (Contrary to local belief, the name has nothing to do with the plague or Black Death.) The soil was poor and was not cultivated, but chalk, gravel and larger pebbles for ballast were dug out of it. This left the deep pits all over the Heath. Some are now ponds and some were filled in with rubble from bomb sites in the Second World War.