_When does Easter end_?--An enactment of the legislature directs a certain act to be done "_within two months after Easter_" in 1850, under a penalty for non-performance. I have no difficulty in finding that two calendar months are meant, but am puzzled how to compute when they should commence. I should be much obliged by being informed when Easter ends? that question set at rest, the other part is easily understood and obeyed. H. EDWARDS. _Carucate of Land_.--Will any one inform me what were the dimensions of a carucate of land, in Edward III.'s time? also, what was the comparative value of money at the same date? Are Tables, giving the value of money at various periods in our history, to be found in any readily accessible source? E.V. _Members for Calais_.--Henry VIII. granted a representative in the English parliament to the town of Calais. Can any of your correspondents inform me whether this right was exercised till the loss of that town, and, if so, who were the members? O.P.Q. _Members for Durham_.--What was the reason that neither the county nor the city of Durham returned members to parliament previous to 1673-4? O.P.Q. _Leicester, and the reputed Poisoners of his Time_.--At page 315. vol. ii. of D'Israeli's _Amenities of Literature_, London, 1840, is as follows:-- "We find strange persons in the Earl's household (Leicester). Salvador, the Italian chemist, a confidential counsellor, supposed to have departed from this world with many secrets, succeeded by Dr. Julio, who risked the promotion. We are told of the lady who had lost her hair and her nails," ... "of the Cardinal Chatillon, who, after being closeted with the Queen, returning to France, never got beyond Canterbury; of the sending a casuist with a case of conscience to Walsingham, to satisfy that statesman of the moral expediency of ridding the state of the Queen of Scots by an Italian philtre." Where may I turn for the above, more particularly for an account of the lady who had lost her hair and her nails? H.C. April 9. 1850. _Lord John Townshend's Poetical Works_.--Can any of your readers inform me whether the poetical works of Lord John Townshend, M.P., were ever collected and published, and, if so, when, and by whom? His lordship, who, it will be remembered, successively represented Cambridge University, Westminster, and Knaresborough, was considered to be the principal contributor to the _Rolliad_, and the author of many odes, sonnets, and other political effusions which circulated during, the eventful period 1780-1810. OXONIENSIS. May 4. _Martello Towers_.--Is it the fact that the towers erected along the low coasts of Kent and Sussex during the prevalent dread of the French invasion received their designation from a town in Spain, where they were first built? By whom was the plan introduced into England? Is any account of their erection to be found in any _Blue Book_ of the period? E.V.