I wish particularly to know the _maiden_ name of this Catherine Barton; she married Mr. Conduitt, who succeeded Sir I. Newton as Master of the Mint. J. E. R. S. Sampford, Braintree, April 7. 1851. _Sempecta at Croyland._--DR. MAITLAND has so kindly answered your correspondent's Query respecting his work on Mesmerism, that I venture to ask him another, through the medium of your pages. Where can be found the poem respecting the old soldier monk at Croyland (or Sempecta, as Ingulphus calls him), from which DR. M. has given extracts in p. 305. of his _Dark Ages_? H. R. L. Trin. Coll. _Schmidt's Antiquitates Neomagensis--Roman Medicine-stamps._--Can any of your readers inform me,-- 1st. Of the DATE when Schmidt published his _Antiquitates Neomagensis_, and WHERE: also in what libraries it is to be found? 2nd. Of the existence of any Roman medicine-stamps found in the British Islands, as yet undescribed by those who have written on the subject. Q. _Sir Harris Nicolas' History of the Royal Navy._--Is there any probability that the _History of the Royal Navy_, begun by Sir N. H. Nicolas, and carried by him to the reign of Henry V., will ever be continued. It is a most valuable work, and was stopped by his lamented death, just as it was beginning to be most interesting. E. N. W. _Wooden Baldrocks._--_Thanksgiving-book._--In the vestry-books of St. Peter's, Ruthin, co. Denbigh, there are some entries, explanations of which will be very acceptable. From 1683, and many subsequent years, there is a constant repetition in the churchwarden's account of "Wooden Baldrocks," from time to time supplied new to the parish. In 1704, "A Thanksgiving-book" is charged in the parish accounts. Query the use and nature of Baldrock? and what book is meant by a Thanksgiving-book? About the above period, continual payments are made for the destruction of hedgehogs, which seem to be valued at sixpence a-piece, in some cases fourpence; and to have been allowed in the parish accounts. A CHURCHWARDEN. _History of the Jesuits._--Who was the author of _A History of the Jesuits; to which is prefixed a Reply to Mr. Dallas's Defence of that Order_. It was published in two volumes 8vo., London, 1816, by Baldwin, Cradock, and Joy, Paternoster Row. H. R. L. Trin. Coll. _Mind your P's and Q's._--What is the origin of this phrase? I have heard one solution of it, but wish to ascertain whether there is any other? R. D. H. _Mode of hiring Domestic Servants in Holderness--Sittings--Fest._--It is customary once a year for men and women servants out of place to assemble in the market places of Hedon and Patrington, the two chief towns in Holderness, and there to await being hired. This very ancient custom is called Hedon _Sittings_ or _Statutes_. What is the name derived from? A small sum of money given to each servant hired, is supposed to legalise the contract, and is called the _Fest_. From what is the word derived? F. R. R.