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May it Please your Honours
With most Humble Submission and in obediences to your Honours Commands I have hereunto annexed the Estimate of Jeffreys Grove, the best I am capable to do at so great a distance and supposeing the Grove to be in the like Condition I have knowne and been informed, shee has been for some years past.
It is my opinion that the Grove when the Lease is expired, if not Ruined by Unfair working may be Lett to some that will worke her fairly and effectually too; att every 6th or 7th Duty.
As to the Late Lord Darwentwaters Lead Mines they were Generally Lett by Tack Note or Lease, paying one fifth Duty and Limmitted to a certain number of yards in length and breadth.
A tack note should be Renewed every year if no Lease in that time be Demanded.
A Lease is generally for 21 years Granted, and Subject to a great many Covenants and the Discontinueing workeing with such a number of pickmen as Agreed to, or the breach of the other Covenants by Unfair working, the same becomes a forfeiture into the hands of the Lord of the Royalties.
As to Collierys they are More or Less valueable, according to theire Situation, the height of the seam, the Goodness of the Coal, and the Water Charges that may attend the Same & the other Contingencies, together with Conveniencies to the water as to wayleave etc which without viewing one may be vastly wide in estimation. And are generally Lett for a yearly Rent or by the Term which is Generally accompted better.
Jonathan Maughan
[separate sheet, item FEC 705 I 9/3]
Some things previous which are Necessary to be knowne, before any Estimate can be made what proffitts in all probability a Lead Mine may produce, Viz What repair the Shafts and Sumps, Topp and Low Levells are in, Crosscutts and Midlings, foreheads and Water Gains etc.
In obedience to your Honours Commands I have as under given some Idea what Jeffreys Grove may produce if continue in the like condition as has been for some years past.
If Jeffreys Grove produce as Duty Oar to the value of £210 the Dues being each 10th part. The Oar being sold at 40s per Bing each Bing contains 8 cwt or 64 stones
The Lessees Quantity of Oar 945 Bings
The Lords Dues 105
Tott 1050 Bing
To 1050 Bing of Oar at 40s per Bing £2100-00-00
Note that every 5 Bings of Oar produces
one fother or 21 cwt of lead if well washed
5 Bings of Oar at 40s per Bing £10
Smelting and fuel 00-12-00
Carriage to the Mill 00-01-08
Extracting the silver from the lead 00-10-00
Loss of lead in extracting 01-05-06 12-09-02
Prof[it] per fo[ther] 01-12-06
14-01-08
1050 Bing of Oar will make 210 fother of lead
210 fo[ther] of lead with the charge at £12:9:02 £2623-05-00
profit in extracting etc 334-05-00
£2957-10-00
An explanation of the Termes on the other side
Shafft – A shaft in Lead Mines, is that which is Called a Pitt in Collierys and is Suncke or Digged sometimes 20 to 50 yards in Deepness from the Surface, as Occasion may Require.
Sumps – A Sumpe or Sumpes are Continued one to another for Convenience of Drawing the Mettall to the foot of the Shafft etc.
Topp & Low Levells – The Topp Levells are Generally for Conveying the water and air from one Shafft to another, the Low Levells are for the like use to the Sumps.
Midlings – The Midlings in Groves are the same as walls and pillars in Collierys, to prevent the Sides and Earth from falling, which when unfairly wrought is of evil consequence.
Gins – the water Ginns are for working Deeper then has Levells and bringing the water to the Levells.
To Winning and washing 1050 Bings of Oar
at 20s per Bing Supposing that one with
another may be wrought £1050-00-00
To timber and Wincells 4s per Bing £210-00-00
Steward Sallery & Water Charge £100-00-00
£1360-00-00
Proffit if wrought and Sold in Oar £740-00-00
£2100-00-00
Note that each fother of this Lead will
produce 20 ounces of fine silver
20 oz of fine silver at 5s 7d per oz £5-11-08
the fother of lead £8-10-00 £14-01-08
210 fothers of Lead with the silver that is
extracted from it at £14-01-08 per fother £2957-10-00
If the Like Quantity be gott and if
sold in Oar the profit will be £740-00-00
If in lead and extracted £334-05-00
Pro[fit]: £1074-05-00
FEC 1/705. Undated but from the context reads as though written as a covering letter for the estimated costs of mining at Jeffreys Grove (FEC 705 I 9/3). This is difficult to date, but from context reads as though a follow-up to the earlier report of Dec 1719, and of use to any deliberations regarding issuing a new lease. The Jeffries lease was said to expire in Feb 1720. 1 Feb 1720 is used here.
