Red Oak. The Morgan Horse Magazine. Feb 1984

https://beta.allbreedpedigree.com/red-oak-7igneEZb/pedigree

Red Oak is a rare source of General Gates that does not come through Bennington (Linsley is the other source). 

His dam, Marguerite, at first glance may seem to lack much Morgan blood, but a closer look shows many crosses back to Justin Morgan. 

https://beta.allbreedpedigree.com/marguerite-HebPuwF1/pedigree

It is also interesting to read the information on the above link. 

The following about Red Oak is from the AllBreed site--

Color: b Height: 15.3 AMHA #5249 Bay, faint star, bh socks white, 15.3, 1075 lbs. Foaled 5/1/1906, Middlebury, VT. Bred by Joseph Battell. 1st - 1907 Middlebury, Vermont Fair in competition with 20 entries of same age. Very handsome and excellent horse. Sold to: 1906 USDA and kept at USMF, Middlebury, Vermont; 1911 sent to State Agricultural College, Amherst, Massachusetts, for stock purposes; July 20, 1925, Richard Sellman Estate to A. & M. College of Texas, College Station, Texas, USA. Registered Morgan progeny: 47 colts, 57 fillies.

The foals he sired in the east were not thought highly of, but he made his contribution to the Morgan world in Texas for Richard Sellman. Sellman kept some of his sons to breed with, but it is through his daughters that he mostly lives on. Many of those daughters came to California to found Roland Hill's program. Other daughters went to other Morgan breeders and to ranch breeders and sometimes found their way into what was to become the Quarter Horse. His son, Redolent, went to Tom Burnett's Triangle Ranch and can be found behind the QH. Some of Red Oak's get went to the Miles City. US Ag. Station and left legacy there. 

It would take a book to delineate all the ways Red Oak comes down to today.