| A 'St. Patrick' halfpenny of John de Courci | Seaby, W. A. | Article in Journal | | 1959 |
| A bronze weight box form Grey Abbey, Co. Down | Seaby, W. A. | Article in Journal | | 1958 |
| A fourteenth-century hoard of Scottish groats from Balleny townland, Co. Down | Seaby, W. A.Stewart, B. H. I. H. | Article in Journal | | 1964 |
| A late Elizabethan coin-hoard from Springhill forest, Ballindrum townland, Moneymore, Co. Londonderry | Harper, A. E. T.Seaby, W. A. | Article in Journal | | 1973 |
| A new document in the Public Record Office : defensive houses in medieval towns | Jope, E. M.Seaby, W. A. | Article in Journal | | 1959 |
| A parcel of Long Cross coins : from the 1869 Tower Hill hoard? | Dolley, MichaelSeaby, W. A. | Article in Journal | | 1966 |
| A small hoard of Mary Queen of Scots coins from Co. Antrim | Seaby, W. A. | Article in Journal | | 1972 |
| A St Patrick halfpenny of John de Courci | Seaby, W. A. | Article in Journal | | 1958 |
| An eighteenth century sword by Thomas Shephard of Dublin | Perceval-Price, M. C.Seaby, W. A. | Article in Journal | | 1968 |
| Anglo-Saxon hoards and coins found in the north of Ireland | Seaby, W. A. | Article in Journal | | 1961 |
| Castlecomer tokens : an inquiry | Seaby, W. A. | Article in Journal | | 1966 |
| Catalogue of Ulster tokens, tickets, vouchers, checks, passes etc. | Seaby, W. A. | Article in Journal | | 1971 |
| Catalogue of Ulster tokens, tickets, vouchers, checks, passes, etc., mostly dating from mid-to-late-nineteenth century and the early part of the twentieth century | Seaby, W. A. | Article in Journal | | 1980 |
| Die-links of an eleventh-century Dublin penny in the Isle of Man | Seaby, W. A. | Article in Journal | | 1980 |
| Hiberno-Norse coins, Ulster Museum, Belfast | Seaby, W. A. | Monograph or Collective Volume | Ulster Museum | 1984 |
| Le money del Oraylly (O'Reilly's money) | Dolley, MichaelSeaby, W. A. | Article in Journal | | 1967 |
| Medieval coin hoards in north-east Ireland | Seaby, W. A. | Article in Journal | | 1955 |
| The 16th century coin-hoard from Moig South, Askeaton, Co. Limerick | Dolley, MichaelGallagher, C.Seaby, W. A. | Article in Journal | | 1969 |
| The anomalous long-cross coins in the Anglo-Irish portion of the Brussels hoard | Dolley, MichaelSeaby, W. A. | Article in Book | | 1971 |
| The extant Ormonde pistoles and double pistoles of 1646 | Brady, G.Seaby, W. A. | Article in Journal | | 1976 |
| The half-harps of Henry VIII's Irish coinage | Seaby, W. A. | Article in Journal | | 1987 |
| The thirteenth-century Anglo-Irish coins in the Kirial find from Denmark | Dolley, MichaelSeaby, W. A. | Article in Journal | | 1973 |
| Two coin hoards of the rebellion period (1641-9) from Ulster | Seaby, W. A. | Article in Journal | | 1958 |
| Ulster beggars' badges | Seaby, W. A. | Article in Journal | | 1970 |
| Ulster Museum, Belfast. Part 2 : Hiberno-Norse coins | Seaby, W. A. | Monograph or Collective Volume | | 1984 |