In November 1859, almost half a year after Peter Lassen’s death, Joe Kitts, Antone Storff, and John Tutt joined another party that returned to Black Rock to bring Lassen’s remains back to Susanville and Honey Lake Valley. Lassen was buried outside Susanville with Masonic honors on November 27, 1859, under the big tree where he had camped his first night in the valley, where he had wanted his last resting place to be, and on his own land. Three years later, on June 24, 1862, a ten-foot monument of local volcanic rock was erected over his grave, bearing an inscription that said he had been killed by Indians on April 26, 1859, with a crossed gun and arrow and a powder horn below it. Weathering later disintegrated that monument, and on September 20, 1917, a new granite monument was erected nearby, but its inscription incorrectly gave Lassen’s age as sixty-six and the date of his death as February 26, 1859; he was actually fifty-eight when he was killed on April 26. At a May 22, 1859 meeting of the Masonic Lodge of Honey Lake Valley in Susanville, Lassen was remembered as an enterprising citizen, a warm-hearted friend, a true and faithful brother, and an ardent member of Western State Star Lodge No. 2 at Shasta, California. The identity of Lassen’s killer remained unresolved, as people long questioned whether Indians or white renegades were responsible. On May 20, 1859, Indian Agent Major F. Dodger suggested that a white man, Lemericus Wyatt, might have been the murderer, and rumors also touched Captain Weatherlow or one of four men from his party who had camped about a mile from the murder site, but Weatherlow protested and that suspicion was rejected. Another possibility raised later was that if Lassen had possessed a map to a silver mine, knowledge of it might have led to the killings of both Peter Lassen and Edward Clapper, but no definite answer was ever found.