How may Muttasil Hadiths in First Century of Haijra

Imam al HADITHS Abu Hayyan Sai'd told that in First Century of hijra there were about six hundred 600 hadiths persists. The early hadith narrators are listed as below,,

1. QASIM BIN MOHAMMED BIN ABI BAKAR ( RA )
24 ~106 AH, grew up under the kind guardian ship of his Paternal Aunt  Mother of Companions Ayesha Siddiqa RA after his father in 36 AH in the age of 12 years. Qasim bin Muhammed lived with Ayesha Siddiqa RA till her death in 58 AH.Qasim bin Muhammed narrated only 200 hadiths from the authority of Ayesha Siddiqa ,Abdullah bin Umar , Umme Salma , Ibn e Abbas etc. Qasim considered as the top scholar in Medinah.
The golden chain of narrations are
Qasim - Ayesha , Qasim - Ibn e Umar , Qasim - Umme Salma.

2. NAF'Y Mula IBN E UMAR  , died in 117 AH.

Nafey Mula Ibn e Umar was the companion of Abdul bin Umar for 30 yeear.He narrated about 188 hadiths from Ibn e Umar.

3. HAMMAM IBN E MUNABBAH
( 40 ~ 131 AH ) Hammam Ibn e Munabbah was the student of Abu Huraira RA . Hammam narrated 139 hadiths from Abu Huraira RA. The collection of ibn e Munabbah considered the early written hadiths . It is called " Sahifa Hammam ibn e Munabbah ".

Total no of Hadiths  were less than 600 in First Century of Hijra. In the first quarter of second  century Hijra Malik bin Anas ,compiler of Mut'a Imam Malik also compiled around 600 hadiths ,1100 Asar-e-Sahaba ( Narrations of the Companions of Rasool Allah SAW.

So  it is proved that the total no of hadiths in first Hijri were around 600.