Two friezes, by Lydia Roetter Castelhun, 10 November 1856.  She was the oldest child in Paulus Roetter's second marriage (Lydia had four older half-siblings).  This is the oldest drawings of hers that my family still owns... she was 10 years, 1 month, 24 days.  This entire collection was done between ages 10 to just short of her 15th birthday.