The ownership of one image in particular has attracted interest: "Moonrise". Although Adams kept meticulous records of his travel and expenses, he was less disciplined about recording the dates of his images, and he neglected to note the date of "Moonrise". But the position of the Moon allowed the image to be eventually dated from astronomical calculations, and in 1991 Dennis di Cicco of "Sky & Telescope" determined that "Moonrise" was made on November 1, 1941. Since this was a day for which he had not billed the department, the image belonged to Adams.