 Complete the following phrase:  In 1971, it was decided that Östra Kyrkogatan would be extended over the Ume River, adding a third bridge to the city, Kyrkbron. At the commencement of construction, a grave field next to the church was discovered. In accordance to the Antiquities Act Swedish: Fornminneslagen, construction was halted the summer of 1972, until the area had been investigated by archaeologists. The original boundaries of the cemetery were unknown and there was no registry or map. The excavation unearthed forty coffin graves with approximately sixty skeletons. In the last grave a legible name plate revealed that it was a family grave for the governor Pehr Adam Stromberg. No tombstones were found. It is believed that a tombstone was destroyed in 