In January, 1839, Mr. Lewis was appointed a Poor-Law Commissioner, and held the office until July, 1847; when, determining to enter Parliament, he resigned, and was returned, with Mr. Joseph Bailey, Jr., and Mr. Francis Wegg Prosser, both Conservatives and Protectionists, without opposition, for Herefordshire. In November, 1847, he was appointed joint secretary of the Board of Control, with Mr. James Wilson, M.P. for Westbury, and early in the following year made his first speech in the House, in opposition to a motion for the production of papers in the case of the lately deposed Rajah of Sattara. In April, 1848, Mr. Lewis was appointed Under Secretary of State for the Home Department, and was succeeded in the secretaryship of the Board of Control by the Hon. John E. Elliot, M.P. for Roxburghshire. In his present office Mr. Lewis has served on the Smithfield Market Commission, appointed in November, 1849, which has just brought up its report; and upon that subject, the Irish Poor-Law, and Mr. Disraeli's motion as to local burdens, has spoken in the House. Last year he brought forward a road bill to consolidate the management of highways, and dispose of the question of turnpike trusts and their advances. The bill was not proceeded with last session, and has again been brought forward this year, with reference, however, only to highways. Mr. Lewis has earned reputation as the translator of "Boukli's Public Economy of Athens," which, as well as the "Dorians," has become a textbook, and passed through a second edition; and is known as author of an able essay on the "Use and Abuse of Political Terms," published in 1832; on the "Origin and Formation of the Romance Languages," published in 1835; on "Local Disturbances in Ireland, and the Irish Church Question," in 1836; on the "Government of Dependencies," in 1841; and "On the Influence of Authority in Matters of Opinion," in 1849. ORIGINAL LETTER FROM DR. LAYARD UPON ANCIENT ART, &c. We present in this number of the _International_ a communication from the most celebrated traveler of the nineteenth century, AUSTEN HENRY LAYARD, upon the sources of _Ancient Art_. It was addressed by the distinguished author to his friend and ours, Mr. MINOR K. KELLOGG, the well-known painter, who was for some time with DR. LAYARD in the East. * * * * * MY DEAR FRIEND: