This is amazing!
6750 NGC + 600 IC observations with 13" and 17.5" scopes.
Steve Gottlieb's
NGC/IC Observations Database Files
These are Steve Gottlieb's own personal observations for about 6571 original NGC entries (6750 total {NGC + alphabetic suffixed NGC} and 600 IC objects) all of which have been checked for historical accuracy. Outside of the NGC itself,
this is likely the most complete contemporary resource of NGC observations, by a single observer, available anywhere. A hat tip and a salute to Steve!
http://www.ngcic.org/gottlieb/default.htm