59. Peter GRUBB. Born abt 1755. Peter died ? .
"Peter appears to have lived with his father's cousin, Joseph Buffington, whose wife was Mary Few, a first cousin to Ann Few. Joseph writing from Marcus Hook, Aug. 3, 1766, to his mother, and alluding to the sickness in his family, says, 'I should be glad Curtis Grubb knew how bad his son is.'... His father conveyed to him a one-sixth interest in the Cornwall ore hills and furnace, June 28, 1783, and Peter Grubb and Mary, his wife, conveyed the same to Robert Coleman by deed of May 9, 1786, reserving the right for a sufficient quantity of ore for one furnace; which right was held in 1878 by Ferguson, White & Co., proprietors of Robesonia furnaces, in Berks county, as stated by Swank." 
From "The New Era", Lancaster, PA, Monday, December 17,1877:
An Iron Ore Controversy.
In 1786 Peter Grubb owned one-sixth of the Cornwall Iron Mines, in Lebanan county, which he conveyed to Robert Coleman, reserving, however, to himself and his heirs forever the right to enter and take from the property enough ore to supply one furnace. Then smelting was a primitive process, and but little ore was needed to fill this requirement, 1,500 tons a year being an average product. But now, by reason of many inventions and improvements, 15,000 tons is not an uncommon production. The Grubbs claimed the right, under their reservation, to take ore enough to supply one of these most improved furnaces. To this the Colemans objected, and prolonged litigation has been the consequence. The decisions thus far have been in favor of the Grubbs, but the litigation has by no means ended.
On 16 Nov 1780 when Peter was 25, he married Mary GRAY, daughter of George GRAY Esq. & Martha UNKNOWN, in Philadelphia, PA. (Christ Church record).
They had the following children:
Curtis married Polly UNKNOWN.