It would occupy more space than "N. & Q." can afford to complete the list up to the present time. In the British Museum Catalogue alone, between the years 1700 and 1800, there are about 120 Forms of Prayer; and, between 1800 and 1850, about 113 more. Let me, before leaving the subject, draw the attention of your readers to the following extract from Straker's (Adelaide Street, West Strand) _Catalogue of Books_, printed in 1853, pp. 419.: Article "1862. COMMON PRAYER. Forms of Prayer, an extensive collection of, issued by authority, on public occasions; such as War and Peace, Plague and Pestilence, Earthquakes, Treason and Rebellion, Accession of Kings, Birth of Princes, &c. &c., from A.D. 1550 to A.D. 1847, consisting of 45 in manuscript and 181 printed, together 226; many of which are of the greatest scarcity, with a detailed catalogue of the collection, 8l. 8s. 1550-1840 [_sic_]. "The late J. W. Niblock, D.D., F.S.A., was actively engaged for upwards of _thirty years_, (with {406} great trouble and expense) in forming this exceedingly interesting and valuable collection for his projected work, to be entitled 'FORMAE PRECUM, or National State Prayers, issued by Authority, on Fast and Thanksgiving Days, and other public Occasions, from the Reformation to the present Time,' those in manuscript are copied with great care from the originals in public libraries and private collections." This important collection may possibly be unknown to some of your readers who take an interest in matters liturgical. W. SPARROW SIMPSON. Having made it a point, for some years past, to preserve at least one copy of each Occasional Form of Prayer, and wishing to comply with MR. LATHBURY'S request, I send a list of those in my own possession. Form and Thanksgiving for Delivery of the Queen, and Birth of a Prince. 1841. Form and Thanksgiving for Preservation of the Queen "from the atrocious and treasonable Attempt against her sacred Person." 1842. Form and Thanksgiving for abundant Harvest. 1842. Form and Thanksgiving for Delivery of the Queen, and Birth of a Princess. 1843. Form and Thanksgiving for Delivery of the Queen, and Birth of Prince. 1844. Form and Thanksgiving for Victories in the Sutledge. 1846. Form and Thanksgiving, for Delivery of the Queen, and Birth of a Princess. 1846. Form for Relief from Dearth and Scarcity. 1846. Form for Removal of Dearth and Scarcity. Fast. 1847. Form and Thanksgiving for abundant Harvest. 1847. Form and Thanksgiving for Delivery of the Queen, and Birth of a Princess. 1848. Form for Maintenance of Peace and Tranquillity. 1848. Form for Removal of Disease. 1849. Form and Thanksgiving for Removal of Disease. 1849. Form and Thanksgiving for Delivery of the Queen, and Birth of a Prince. 1850. ABHBA.