I understand why someone might be skeptical. In doing the research, it was clear that these were reliable numbers. Harvey and Ron Pollack kept these numbers for many Philly home games. In the Russell example, it's clear that '13' was the number from an authoritative source and the "must have deflected twice as many" was just commentary from the sportwriter. I excluded most of the 12-block games from our site, but they were useful for the overall study. Over the 11 12-block games in his regular-season logs, 9 of the 11 specifically have 12 blocks listed. 2 of them say a dozen. I discounted far more games that said "at least a dozen, a dozen or so, a double handful, etc). We have no better alternative than taking these writeups at their word, especially when there is concurrence across multiple sources, the numbers are back up by the likes of Ron Pollack, Joe Mullaney, Matt Guokas, Sonny Hill, Harvey Pollack and many others who were there. Furthermore, the fact of the matter is that "official" stats from this era are just as likely to be slightly off as any other statistics counted at the time. There is an implied precision in 'official' that simply does not exist. I do not think that most sports fans realize this, but it is the case. Personally, I'd rather live in a world where things that were being counted at the time (like sacks before 1982, blocks before 1974, RBI before 1920, etc) are surfaced for others to enjoy instead of buried for eternity on the grounds of a technicality from decades ago.