| B continued |
| Surname and name | Occupation | Address | Additional Notes |
| Bicker Thomas | grocer | Guardia del Monte | agent for "The Standard" |
| Bieber & Co. | merchant | Reconquista 27 | |
| Bilberg G. E. | Norwegian & Swedish Consul |
Perú 83 | killed by a police rocket that struck him in the eye (Marion Mulhall, p. 102) |
| Billinghurst Mariano | auctioneer | Potosí 70 | |
| Bilton William | C. E., Northern Railway | San Fernando; died (appendix) | construction (or civil)? engineer |
| Binden J. | merchant | Reconquista 16 | |
| Black J. | San Vicente | ||
| Black J. & J. | lumber merchants | Victoria 269 | |
| Black W. | Cañuelas | ||
| Blaikie John | San Vicente | ||
| Bletscher & Co. | leather merchants | Maipú 28 | |
| Bleumstein & La Roche | millers | Balcarce 34 | |
| Blues John | grocer | Cangallo 18 | |
| Blumberg L. Victor | law agent | Strangers' Club, San Martín 44 | |
| Boffi A. | merchant | Strangers' Club, San Martín 44 | |
| Boggins William | San Antonio de Areco | ||
| Bohmer Adolfo | Rivadavia 192 | ||
| Boie Bros. | merchants | Reconquista 27 | |
| Boland John | Chascomús | ||
| Bollasty James | removed from Mercedes to Rojas (appendix) |
||
| Bolsa The | San Martín 106 | ||
| Bonich Luís | merchant | Bolívar 12 | |
| Bonnemason & Heydecker |
importers | Bolívar 76 | and shipping agents (Mario D. Kurchán) |
| Bonnement J. R. | barraquero | Strangers' Club, San Martín 44 | |
| Bookey Patrick | estanciero | Santa Catalina | |
| Bookey Patrick J. | tanner | Venezuela 149 (or 190) | |
| Boothe Louis | estanciero | San Nicolás, Rincon de Ramallo | |
| Bosch & Sempé | Hotel Provence | Cangallo 25 | |
| Boschetti J. N. | Reconquista 24 | ||
| Boulson W. | Strangers' Club, San Martín 44 | ||
| Bouthron Robert | Guardia del Monte | ||
| Bove C. | barraca | Plaza Once de Setiembre | |
| Bowers C. J. | gone to U.S. (appendix) | ||
| Bowers C. S. | agent sheep wash | Defensa 97 | |
| Bowers Henry | San Antonio de Areco | ||
| Boyd J. P. & Co. | ship brokers | Reconquista 24 | |
| Bradley J. | accountant, River Plate Bank | Piedad 85 (appendix) | |
| Bradley Mrs. | lodging-house | Mayo 136 (or 168) | |
| Brady Francis | estanciero | Guardia del Monte | |
| Brandt Sohn & Co. | merchants | Piedad 268 | |
| Brandt Th. | Paseo Julio 49 | ||
| Brash William | Potosí 52 | ||
| Brennan Connor | Luján | ||
| Brennan M. | estanciero | Baradero | |
| Brennan Michael | estanciero | San Antonio de Areco | |
| Brills Charles | undertaker | Reconquista 196 | |
| Brittain N. James | merchant | Cuyo 123 | |
| Brix J. A. | broker | Bolsa, San Martín 100 | |
| Broderick Michael | Navarro | ||
| Broderick Richard | estanciero | Fortín de Areco | |
| Brokel J. R. | merchant | Piedad 101 | |
| Brown A | carpenter | Barracas, calle Larga | |
| Brown Alexander | doctor | Reconquista 195 | |
| Brown George F. | merchant | Strangers' Club, San Martín 44 | |
| Brown Hugh | Florida 46 | ||
| Brown J. | San Vicente | ||
| Brown John | estanciero | Luján | |
| Brown John | Cañuelas | ||
| Brown John | Moreno | ||
| Brown Laurence M. | estanciero | Luján | |
| Brown N. | Florida 86 | ||
| Brown Patrick | saladerista | Barracas | |
| Brown Patrick | Luján | removed to Salto (appendix) | |
| Brown Richard | Barracas | ||
| Brown Thomas | Paseo Julio 2 | ||
| Brown William | Cañuelas | ||
| Brown Mrs. Admiral William | Mayo 171 | ||
| Browne George | Magdalena | ||
| Brownells & Co. | merchants | Maipú 19 | |
| Bruce Captain David | of the steamer Pavón (appendix) |
of Juan Manuel Cárrega, Cangallo 30 | |
| Bulrich A. senr. | grocer | Piedad 145 | |
| Bunge & Benn | shipbrokers | Mayo 49 | |
| Bunge & Co. | Reconquista 140 | ||
| Burgess C. A. | Piedad 503 & Defensa 7 | ||
| Burgess Patrick | estanciero | Lujan | |
| Burke John | Zárate | ||
| Burmeister M. | produce broker | Bolívar 70 | |
| Burmeister Hermann | Inspector of Museum | Potosí y Perú | |
| Burnett M. | San Vicente | ||
| Burnett S. | Chascomús | ||
| Burns Charles | Luján | ||
| Burns James | Luján | ||
| Burns John | estanciero | Luján | |
| Burns Mrs. | inn & lodging-house | Parque 48 | gone to camp(appendix) |
| Burns Patrick | Cañuelas | ||
| Burns Peter | San Pedro | ||
| Bushmeyer A. | pianist | Strangers' Club, San Martín 44 | |
| Butler John | houseowner | Corrientes 259 | |
| Butner James | Moreno 235 | ||
| Butterfield Charles | estanciero | San Andrés de Giles | |
| Buttren George F. | Reconquista 70 | ||
| Byrne John | San Andrés de Giles | ||
| Byrne Mathew | Ensenada |