Where in the World is David Watt?

One of the first places genealogists look for information on their ancestors is in census records.  United States Census records can be found through Family Search and Heritage Quest for free.  Heritage Quest is available through many local libraries.   

I am compiling that information for my ancestors in table format, once a month.  This month shows where David Watt can be found in the Scotland Census and United States Federal Census.  I am missing the 1871 Scotland Census.  David immigrated to Canada in 1879 and the United States in 1881, causing him to miss the 1880 U. S. Census and the 1881 Census of Canada.

FACT	DATE	PLACE OF RESIDENCE	ENUMERATION DISTRICT/PAGE ID./DWELLING
Birth	25 Sep 1858	Methil, Fife, Scotland
Census	1861	Wemyss, Fife, Scotland
Census	1900	Marquette, Marquette, Michigan, United States	116/9/160
Census	1910	Marquette, Marquette, Michigan, United States	191/8B/174
Census	1920	Marquette, Marquette, Michigan, United States	235/13A/230
Census	1930	Marquette, Marquette, Michigan, United States	52-22/7A/142
Census	1940	Marquette, Marquette, Michigan, United States	52-28/13B/260
Death	21 Mar 1945	Marquette, Marquette, Michigan, United States