Manuscript, 'Account of an echo' by Sir R [Robert] Moray Moray reports on an echo experiment he carried out near Rosneath [Argyll and Bute, Scotland]. He placed a trumpeter at a low ground, A, facing toward C, a house built of stone, and asked him to play eight semibreves for about ten seconds. The first echo appeared to come from between B, a rocky precipice, and C; the second one from around D, a church; and the third echo from between D and E, another church. F is the head of the lake, and H, the ‘fair house’ at Rosneath, outside Glasgow. Subject: Acoustics [1662]