John L Fletcher About 1809 IN Scotland Conn RI and DC

Looking for a John L. Fletcher born about 1809 in Scotland and in Windham Connecticut by 1850. No information on a wife's name. Children born in Rhode Island: Mary E. Fletcher about 1834, Jane E. Fletcher about 1836, Anne Fletcher about 1837, Elizabeth Fletcher about 1839, William Fletcher and Harriet A. Fletcher. And then William's kids born in DC, his wife was Martha A. Dant, Children were: Henry Fletcher, Jesse Fletcher, Mary Blanche Fletcher, Charles H. Fletcher, Anne C. Fletcher, Cecelia Fletcher, Amy Fletcher, Frank Fletcher.
Thanks
Amy