sir CHRISTOPHER WREN, int.

understood nothing of the Business, and perhaps they as little, that affecthim. This I mind you of, because I have not mentioned it in the Letter,which I have wrote after my usual Way, with all the Plainness and Sin-cerity imaginable, and so, as not to give Monf. CaJJim , nor any other anyOffence, or Cause to complain of uncivil Usage. ’Tis something longer thanI designed at first it should be; being a new Subject and uncommon, Ithought it was better to err on this Hand, than to make it obscure by myBrevity.

But I am sorry, I must tell you this will not make me and Mr. HalleyFriends : I have some Papers in my Hands that prove him guilty of disinge-nuous Practices, and know more of him than the Generality of the Worlddoes. He knows I cannot cover Dishonesty, or bear with any thing but whatis just, honest and true; and that I know he regards nothing of these inhis Practices : We must therefore keep at a Distance. I pray God makehim sensible of his Faults ; and as I told him at Brown' s, whenever he be-comes a sincere and honest Man , he is sure to have me his Friend.

I shall be at your End of the Town some Time next Week, when I will^ait on you to clear up any Thing that may appear obscure in my long Let-ter, and pay you the sincere Respects of

SIR ,

Tour moji humble Servants

John Flamstead, M.R.

I desire you to let your Son acquaint my Lord Pembroke that you have the^eluded Letter from me ; and present him with humble Respects and Ser-ies. I have acquainted Mr. Ajlon that I have sent you the included.

NUMB. II.

From the fame Hand to Sir Christopher TVs en.

An Account of the Heights of the Welch Hills , &c.

Honoured Sir , July I, 1696.

l"' O satisfy you that I was not mistaken in the Account of the Heightsof the Welch Hills I gave you, I have examined some Letters I re-eved from Mr. Cafwell, in the Year 1682, who was employed by Mr.^dams in his Survey of Wales , wherein he gives me the Measures of them*ken with good Instruments, made by my Directions.

The Wreckin in Shropshire , he fays, by levelling by a long Pole he foundjj96 Yards above the Level of the Severn. But by a Base and Altitudes takenI a Quadrant with Telefcope-sights, 30 Yards more; 396 + 3 ° + 40, —^66 Yards.

.The Severn in that Place to which he measured is 40 Yards higher thanSea, and falls 3 Yards 3 Inches in five Miles.

Stipersone Clee Hill, in Shropshire, he concludes 600 Yards high.

T enmenmaur in Caernarvonshire, 515 Yards.

Caddorydris in Merionethshire, 97 °’

Snowdown in Caernarvonshire (more than Caddorydris 270 Yards,) = 1240.j, Snowdown distant from Caddorydris 27 xVA Miles. He gives me the►^ight of the S on the Top of Snowdown 25 ^Inches, but notes not the

253

on Caddorydris (July 26, 1682.) 26 T V«- Inches.

t

Permit