Across
1 Pearse or Harrington? (7)
5 On his deathbed, he asked his aide-de-camp, General Daniel F. O’Leary, to burn his archive of writings (7)
9 Chinese society or gang involved in organised crime (5)
10 Unsuccessful CIA-inspired invasion floundered here in 1961 (3, 2, 4)
11This day is also known as International Workers’ Day (3)
12Airey ——- was assassinated in 1979 in a car-bomb attack at the House of Commons (5)
13 Band or rope made of twisted twigs or stems (5)
14 Northern Irish politician associated with the Unionist Vanguard movement (5)
16 Heathen, one without faith (7)
18 Scottish-born politician who served as chief secretary for Ireland from 1887 to 1891 and went on to become prime minister of the United Kingdom (7)
19 Hans Heinz ——-, German actor, poet, philosopher and writer of short stories and novels (5)
21 John Mary ——- was born in Shandon, Cork City, in 1917 (5)
23 Charles ——-, Irish apothecary, physician and politician known as the ‘Irish Wilkes’ because of his radical views (5)
25 The profession of Belle Boyd or Mata Hari, for example (3)
26 Sicilian city renowned as the site of the ancient Greek city of Akragas, one of the leading cities of Magna Graecia during the golden age of ancient Greece (9)
27 ——- Crosby, American soldier and spy during the Revolutionary War (5)
28 Tommy ———-, controversial Irish comedian and writer (7)
29 Rat Pack member whose gravestone bears the words ‘The best is yet to come’ (7)
Down
1 General Robert E. Lee crossed this river in 1862, invading the North and threatening Washington DC (7)
2 It was first published in 1896 by Lord Northcliffe (5, 4)
3 Irish founder and first bishop of the monastery of Lindisfarne (5)
4 Territory captured by Anglo-Dutch force during the War of the Spanish Succession and ceded to Britain under the Treaty of Utrecht (9)
5 Waterford-born seventeenth-century author of The Sceptical Chymist (5)
6 Robert Ritter von Greim replaced Göring as its commander-in-chief (9)
7 German impostor who masqueraded as a Prussian military officer in 1906 and became famous as the Captain of Köpenick (5)
8 Irish republican Seán who died on board U-65 during Operation Dove in 1940 (7)
15 Philologist of Irish descent credited as being the first English-speaking Esperantist (9)
16 Military decoration established by King Friedrich Wilhelm III of Prussia (4, 5)
17 United States slave who unsuccessfully sued for liberty after living in a non-slave state (4, 5)
18 Its name in Irish means ‘mouth of the sandbars’ (7)
20 An ancient area of Eurasia extending from the Black Sea to the Aral Sea from the eighth to the fourth century BC (7)
22 Of or relating to Scandinavia or its peoples or cultures (5)
23 His second name was Ilyich (5)
24 Baron von ——-, Prussian statesman who introduced the reforms that paved the way for the unification of Germany (5)