2 clarify
source | link

From 1805 to 1855 (apparently,which are apparently the years for which records are available), the London bes din converted 251 minors who had Jewish fathers. (Source.)

From 1805 to 1855 (apparently, the years for which records are available), the London bes din converted 251 minors who had Jewish fathers. (Source.)

From 1805 to 1855 (which are apparently the years for which records are available), the London bes din converted 251 minors who had Jewish fathers. (Source.)

1
source | link

From 1805 to 1855 (apparently, the years for which records are available), the London bes din converted 251 minors who had Jewish fathers. (Source.)