Only the Catacombs exist at the posted coordinates, and the cache does not exist at the coordinates posted in this story. Only a green light from the Geochecker will provide you with the final location.
Tucked under the city wall, the catacombs were built to accommodate 1,400 coffins in individual vaults on each side of a long, central passage. Although coffins were lowered from above to their resting place, a fine Egyptian façade was built along the front with entrances for the bereaved to enter to attend an interment. The coffin was slid into a brick lined vault while the officiating priest would conduct the service. Nearby, in a small, walled off area was a bricklayer who would wait for the end of the service, when he would then brick up the entrance. A brass plaque, or in some cases, a square stone with details of the deceased would be fixed to the bricks.
The catacombs were also segregated into Anglican and Dissenters with an internal wall and gate across the passageway.
When first opened, the charge for interment was 20 guineas, a charge which proved to be far too high. The first occupant was Richard Everly and the last John Penny. Most of the occupants were from outside of Devon, as wealthy local families preferred to bury their dead elsewhere. The price was dropped to 10 and then 7 guineas, which was not enough to prevent the catacombs from being a commercial disaster. Between 1837 and 1838, only 16 interments were made, all in the Anglican section.
The City took over the venture using the Dissenters end of the passage as a temporary morgue for the unidentified bodies from the Theatre Royal fire in September 1887. The walls of that section were covered with lime wash after the bodies were buried in Higher Cemetery. During the Second War, the cold and dark passageways were used as bomb shelters.
One night, many years ago a group of people met in the cemetery at precisely 22:00, it was a dark winters night. Skies were clear and the moon was full. It's not known of the exact date, but its believed to have been during the month of November, 1979.
The catacombs are not accessible, but somehow they managed to gain access through the front entrance into the main corridor and the 9 people were in, exploring the long, unforgotten corridor under the city wall.
Most of the Vaults had been previously opened up and the bodies removed, but they stumbled on a sealed Vault. The men looked at each other, no words were exchanged. After 5 minutes, they set upon opening the Vault.
It was early hours of the morning at around 01:25 when there was an almighty crash as the door, sealing the Vault fell to the floor.
What looked like an Old Egyptian mummy was contained in the Vault, and on further investigation the date of 1907 was found on the left foot, and N 50 43.182 W 003 32.424 on the right leg.
The looters were after the artifacts, an old map, possibly belonging to the military was discovered, they couldn't work out where it related to but after dusting the bottom right corner they could read 30UVB6195418894, they concluded it could be the map serial number, but were unsure.
They could hear voices in the distance which echoed down the corridor, so with the map in the bag, they quickly moved back out of the corridor into the cemetery.
By this time it had started to rain, they retreated to a large nearby tree for shelter, when they saw several torchlights moving towards the entrance to the catacombs.
Feeling like they had a lucky escape, they decided they would meet up again, but this time to photograph trains, something much less risky. They decided on the same time, in exactly one month, and they booked the reunion at N 50 43.779 W 003 31.539.
As the rain began to ease, they decided on a quick retreat and left the grounds.
The cache can be found a short walk from the Catacombs.
You can check your answers for this puzzle on GeoChecker.com.