The man credited with developing Morse code is shown as a 69 year old "professor" in this 1860 census enumeration from New York City. He has several other family members living with him, including one who is termed an idiot.
You can search the 1860 Census at Ancestry.com for your relative---who may or may not have been listed as an idiot. If you don't have a subscription, you can read our suggestions for a 14 day free trial here.
