Typically, anyone identified in this volume as a "pioneer settler" rated a biographical listing of some type - at least a brief one.This was not the case for Richard Nugent.
Another resource volume, however, does shed a bit of light on the Nugent family.In "Our County - Our Story," by Malcolm Rosholt (1959), there's a mention of Richard Nugent on page 310:
"The Town of Hull was sparsely settled in the first three decades of its incorporation.In the 1866 tax roll nearly 700 forties or portions thereof are listed as 'unknown.'While the first tax roll is missing, the town treasurer's book is available which gives the taxpayers beginning Dec. 24, 1860 through January 29, 1861, presumably the final day for payment."
[The names of the various taxpayers listed are listed next.]
"Others who paid taxes were...Richard Nugent."
This information, at least, documents the presence in Hull of Richard Nugent as early as 1860-61.Maybe even this small bit of information will fit into your "puzzle."