doggedly (adv.)
- assiduously
- devotedly
- diligently
- faithfully
- indefatigably
- industriously
- insistently
- loyally
- obstinately
- patiently
- perseveringly
- persistently
- pertinaciously
- ploddingly
- relentlessly
- resolutely
- sedulously
- stubbornly
- tenaciously
- tirelessly
- unfalteringly
- uninterruptedly
- unrelentingly
- unswervingly
- unwaveringly
- willfully
A man may write at any time if he will set himself doggedly to it.