Irish (?) Teaspoon of Frederick Hervey, 4th Earl of Bristol and Bishop of Derry

Frederick Augustus Hervey, 4th Earl of Bristol and Bishop of Derry

The Honorable Frederick Hervey (1730-1803) was ordained as a Fellow of Corpus Christi College, Cambridge in 1754, became a clerk of the Privy Seal in 1756, and was appointed a Royal Chaplain in 1763.  The Honorable and Reverend Frederick Hervey then undertook an extensive Grand Tour, and during his travels in Europe he further developed his passion for art.  In 1767, he was elected Bishop of Cloyne, and the following year he was translated as Lord Bishop of Derry.  Bishop Hervey succeeded to the title of the 4th Earl of Bristol in 1779.  Lord Bristol was elected a Fellow of the Royal Society in 1782 for his scientific exploration of Giant's Causeway, and received the Freedom of the City of Dublin and of Derry the next year. 

Below are photographs of a teaspoon which I believe belonged to Lord Bristol sometime after 1779, since it is engraved with both a bishop's mitre and the Earl of Bristol's crest.

The maker's mark, struck twice, appears to be CS, but I am having a difficult time finding a match to a silversmith.  Is this an Irish or an English maker?

Lord Bristol was said to have a fiery personality.  He favored religious equality, and financially supported construction of churches of other denominations.  He was also very political for a time, becoming active in the Irish Volunteer Movement and proposing in 1783, at a Volunteer National Convention in Dublin, legislative independence for the Irish Parliament.  This landed him in hot water and almost got him arrested by the British Government.  Hervey was an industrious and vigilant bishop, spending large sums of money building roads, bridges, and developing agricultural enterprise in his diocese and the city of Derry.  The Earl-Bishop took a lively interest in architecture and built homes at Downhill and Ballyscullion which he filled with works of art.  He also commissioned the Italian architect Asprucci to build Ickworth House, photo below, which was completed by his son Frederick in 1830.

Ickworth House (Photo by Squeezyboy on Flickr)

 

In 1752, the Hon. Frederick Hervey married Elizabeth Davers and had four sons and three daughters.  Perhaps their best-known daughter is Elizabeth who was the close friend of Georgiana Cavendish.  "Bess" lived with the Duke and Duchess and was a longtime mistress of the Duke, later becoming his second wife.

If anyone can offer a clue as to the maker of this teaspoon, it would be most appreciated!

Sources:
Blackwood, Loretto. "Early Bishop - Frederick Augustus Hervey."  Web blog post. Earl Bishop  Hervey. Blogger, 7 Oct 2013. Web. 21 Oct 2016.
"Frederick Hervey, 4th Earl of Bristol." Wikipedia, The Free Encyclopedia. Wikimedia Foundation, Inc., 13 Dec 2013. Web. 21 Oct 2016.
"Ickworth House." Wikipedia, The Free Encyclopedia.  Wikimedia Foundation, Inc., 27 Mar 2005. Web. 21 Oct 2016.